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Speaker 1: Welcome back, ron Naani and the Car Doctor here at

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Speaker 1: your service at eight five five five six nine nine

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Speaker 1: zero zero, here to take your calls and answer your questions.

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Speaker 1: Let's do a real quick piece of email. Hey, Ron,

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Speaker 1: thanks for the show. I just bought an eight Chrysler

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Speaker 1: town In Country limited V. Six four to oh with

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Speaker 1: seventy five thousand miles on it. I don't know the

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Speaker 1: vehicle's history, and I'd like to know what would be

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Speaker 1: the best bang for the buck to spend on the

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Speaker 1: car to get the most out of it in the

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Speaker 1: long run.

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Speaker 2: Do I need to change.

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Speaker 1: Plugs, wires, oils, filters or what for three thousand miles

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Speaker 1: and start there. Thanks for the help, Matt. You know what, Matt,

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Speaker 1: The answer to the question is yes to all of it.

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Speaker 1: It's funny. I've got to say that how many years

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Speaker 1: are we doing this radio show now? Twenty three something

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Speaker 1: like that, And I've been repairing cars forty three and

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Speaker 1: as much as technology improves and as much as manufacturers

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Speaker 1: recommend less maintenance every year, it still seems that maintenance

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Speaker 1: is the key to longevity.

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Speaker 2: And there's still certain things you've still got to do.

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Speaker 1: You still have to change oil on a regular basis,

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Speaker 1: and I think these extended oil change intervals are ridiculous.

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Speaker 1: I think they calculate it to take the vehicle out

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Speaker 1: to the max, and then it gets X number of

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Speaker 1: miles on it and the vehicle drops dead at one

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Speaker 1: hundred thousand miles of severe engine hematosis or something like that.

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Speaker 1: It just suffers from that. That's number one. So stay

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Speaker 1: on top of the oil changes. Conventional oil three thousand miles,

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Speaker 1: synthetic oil five thousand miles tops. And though I don't

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Speaker 1: like synthetic blend, I don't get it. I don't see the.

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Speaker 2: Need for it.

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Speaker 1: I think you're either going to be one or the other,

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Speaker 1: and that's all you need to do. Spark plugs, the

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Speaker 1: plugs are probably due on that vehicle either sixty thousand

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Speaker 1: miles or ninety thousand miles. You've got seventy five, you're

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Speaker 1: at seventy five thousand, so you're either fifteen thousand later

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Speaker 1: fifteen thousand early. However, in my mind, if they're doing

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Speaker 1: ninety I would do them at seventy five. By the

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Speaker 1: time it gets ninety on it will the plug come

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Speaker 1: out of the head or is it going to be

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Speaker 1: frozen into that head? Because it's probably an aluminum head,

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Speaker 1: and a four to zer Chrysler is an aluminum head.

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Speaker 1: How easily is that going to come.

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Speaker 2: Apart with the steel spark plug stuck in it?

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Speaker 1: So, yeah, you know what, a little bit early still

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Speaker 1: comes to mind. If enough is good, more is better,

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Speaker 1: too much is just enough? As the car doctor likes

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Speaker 1: to say, fluids. You know what, that's got the new

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Speaker 1: Chrysler trans in it, And I've got to tell you

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Speaker 1: Chrysler doesn't recommend changing transfluid on that car. I yet

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Speaker 1: to see one of those trans transfluid filter exchange is

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Speaker 1: done where we don't take the fluid out and it's brown.

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Speaker 1: We've done a few of those where we're changing the fluid.

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Speaker 2: It's brown.

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Speaker 1: The trans doesn't shift right, it hesitates, it's slow, it bangs,

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Speaker 1: it clunks and does everything wrong that you could possibly imagine.

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Speaker 1: And a fluid change, and I'm not saying this happens

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Speaker 1: every time, but a fluid change in seventy five eighty

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Speaker 1: percent of the vehicles solves the problem. The rest of them,

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Speaker 1: we're just doing good maintenance because we want to go

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Speaker 1: as long as we can on that transmission. Because automatic

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Speaker 1: transmissions are still the weak link in the majority of

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Speaker 1: vehicles as far as the rest of it. Filters, sparkplug wires,

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Speaker 1: you know, normal maintenance. Yes, the answer is yes, yes, yes,

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Speaker 1: thirty sixty ninety thousand mile services still come to mind.

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Speaker 1: I would rotate the tires, I would take a look

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Speaker 1: at the brakes. I would wiggle the front end. I

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Speaker 1: would crawl over the vehicle. See what kind of shape

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Speaker 1: it's been not taken care of, See what kind of

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Speaker 1: shape it's in for the last seven years. If somebody

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Speaker 1: had it, and you know, just in general, give it

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Speaker 1: a good thorough physical. If you go out to my website,

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Speaker 1: ra auto dot com, go to the shop website, go

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Speaker 1: to Raudo dot com. As long as go daddy's doing

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Speaker 1: their job, which this week we kind of learned may

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Speaker 1: not be all the time. Go to rauto dot com.

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Speaker 1: You will find under the services tab some recommended services,

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Speaker 1: some real world Hey, this is what I really say.

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Speaker 1: I still abide by it. I haven't changed that in

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Speaker 1: the better part of six years because I still believe

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Speaker 1: that those service intervals listed there are correct. And you

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Speaker 1: just got to start to ask your questions, like, hey,

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Speaker 1: when I checked the brakes once a year, Yeah, you would,

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Speaker 1: because if you don't drive the car enough, things get rusty,

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Speaker 1: things stick, You want to take a look at the breaks.

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Speaker 1: If you drive the car a lot, breaks where out

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Speaker 1: you want to take a look at the break. So

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Speaker 1: I still go buy that services tab at rauto dot com.

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Speaker 1: You can take a look at that and see what

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Speaker 1: that's all about. Last thing, fuel system and fuel system

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Speaker 1: cleanliness a major problem, a really big deal with new

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Speaker 1: late model cars. And it doesn't matter really how newer

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Speaker 1: old the vehicle is. You know, like an instructor once

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Speaker 1: told me many years ago, we're putting dirt in the

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Speaker 1: tank at three dollars a gallon, and we call it gasoline.

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Speaker 1: So because of the way gasoline is formulated today, because

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Speaker 1: of the way it's handled inside the engine and the

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Speaker 1: combustion chamber, I still believe more than ever that fuel

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Speaker 1: system cleanliness is next to godliness. CRC one tank Power

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Speaker 1: renew best fuel system cleaner on the market, period, hands down.

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Speaker 1: CRC one tank power renew at least once a year,

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Speaker 1: if not twice a year, and you will be amazed

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Speaker 1: at how much better that vehicle operates and the longevity

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Speaker 1: that you get out of the components. And last tip.

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Speaker 1: We're talking about fuel systems. Like somebody asked me the

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Speaker 1: other day, Hey, why do I always have to keep

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Speaker 1: gas in the tank? Because an electric in tank fuel

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Speaker 1: pump gets cooled by the fuel in tank, and running

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Speaker 1: that tank exposed to air is an issue that the

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Speaker 1: pump will eventually overheat. It's a little electric motor liquid

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Speaker 1: around that helps dissipate the heat. You will get longer

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Speaker 1: life out of that pump. And if you don't believe me,

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Speaker 1: wait until you have to change a fuel pump and

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Speaker 1: it's one thousand dollars and then you'll say, hey, I

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Speaker 1: had to keep guessing the tank anyway, I might as

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Speaker 1: well have tried to keep it full. So just things

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Speaker 1: to think about in ways to look at it. The

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Speaker 1: phone numbers eight five, five, five six nine nine zero

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Speaker 1: Zero's let's go over to the phones and let's talk

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Speaker 1: to Let's go talk to Matt on I guess that's

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Speaker 1: line one in faarll On, New Jersey with some questions.

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Speaker 1: Two thousand and two Chevy Track or Hey Matt.

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Speaker 2: How can it help?

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Speaker 3: Sir?

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Speaker 4: Okay? Hi?

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Speaker 2: Hi, yes, sir, good, what's going on?

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Speaker 4: Okay? Two thousand and two, Chevy Track at two point

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Speaker 4: five B six. Okay, the belt, the main serpentine belt squeals.

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Speaker 4: It's a common problem. No, I have not found the solution.

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Speaker 4: There is no spring adjuster on it like your other

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Speaker 4: engines have. There has to be no not on this engine.

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Speaker 2: Then what holds tension on the belt.

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Speaker 4: It's just a two screws and a plate and your

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Speaker 4: slotted left or right to keep it tight.

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Speaker 2: Okay, So it's a manual adjustment.

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Speaker 4: Correct. And when I replaced the belt, I had a

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Speaker 4: difficult time getting it on. It was very tight. There

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Speaker 4: was no place to adjust it looser or tighter. It was.

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Speaker 4: I had to pry it.

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Speaker 2: On righty tighty lefty lucy.

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Speaker 4: Yeah. And now when you put the air conditioning on,

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Speaker 4: it'll squeal. And they're all this weather here in northern

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Speaker 4: New Jersey. Now as you see you you'll get the

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Speaker 4: squealing upon starting it until it warms up the belt.

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Speaker 4: It seems okay, the belt that I put in was

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Speaker 4: a GM belt. Zuzuki is not no longer in business

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Speaker 4: around here anymore. And what what do we do? I mean,

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Speaker 4: I don't think it's well, let me actually slips and

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Speaker 4: burns out.

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Speaker 1: Well, let me, you know, let me back up a second,

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Speaker 1: little little belt one oh one technology. When a belt

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Speaker 1: makes noise, all right, if the tensioner is not the issue,

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Speaker 1: and sometimes it is, but in your case it's it's

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Speaker 1: up to you.

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Speaker 2: So either you're either you're tensioning it wrong.

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Speaker 1: And I don't think you are, because the two seconds

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Speaker 1: I'm talking to you, it sounds like you've got to

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Speaker 1: You've done this enough, that you've done enough research that

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Speaker 1: you know. I don't want to say, gee, it's the

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Speaker 1: belt's not tight enough. However, I do want to caution

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Speaker 1: you and say that it could be the belt's not

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Speaker 1: tight enough. And I want to talk to you a

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Speaker 1: little bit about deflection. If you take the two widest

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Speaker 1: points between the If you take the widest point between

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Speaker 1: two pulleys, all right, can you take the belt and

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Speaker 1: turn it ninety degrees.

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Speaker 4: M turn it? No?

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Speaker 2: You can't right?

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Speaker 4: No?

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Speaker 2: Can you turn it a third of the way?

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Speaker 4: No?

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Speaker 2: Can you turn it an eighth of the way? How

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Speaker 2: tight is this belt?

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Speaker 4: This belt was very tight. I had brought it back

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Speaker 4: to the place I bought it here, and they said

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Speaker 4: to double check the specifications of the numbers in their catalog,

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Speaker 4: and it matched up to the to the oem to

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Speaker 4: the original.

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Speaker 2: I mean, don't get wrong.

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Speaker 1: Tighter is better, but too tight is also bad because

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Speaker 1: it puts where on the components and eventually damages you know,

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Speaker 1: water pump, power, steering, et cetera. It pulls on that

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Speaker 1: bearing too hard and it'll damage that, wear that out,

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Speaker 1: and then stretch the belt and the belt is always

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Speaker 1: out of adjustment.

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Speaker 4: Correct. I put the air conditioning on in the summertime.

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Speaker 4: You can get it to squeal right, which is meaning

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Speaker 4: you're putting it under a load right but right now.

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Speaker 4: And of course in the northern New Jersey here you

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Speaker 4: are not putting it on, but the belt is still

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Speaker 4: squealing until the engine warms up a few minutes away.

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Speaker 1: So there's a couple of things I would do. Dayco

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Speaker 1: makes a product. It's a it's a belt cricket. Have

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Speaker 1: you ever seen this? No, all right, it's a little

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Speaker 1: device that sticks under your index finger and it's a

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Speaker 1: it's a it's a measurement gage. It gives you the

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Speaker 1: ability to You'll you'll understand it when you see it.

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Speaker 1: If you go to dayco dot com. You basically push

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Speaker 1: down on the belt with this this tool on the

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Speaker 1: tip of your index finger and the deflection of the

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Speaker 1: belt is transmit to the tool, and you can read

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Speaker 1: the tension of the belt. So you can number one,

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Speaker 1: adjust the belt to spec if it colts for eighty

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Speaker 1: five foot pounds a load, you can adjust that. You

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Speaker 1: can adjust it and look at the cricket and click

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Speaker 1: it again, and so on and so forth.

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Speaker 2: That's number one. Number two.

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Speaker 1: While you're there, take a look at the conversation they

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Speaker 1: have about belt alignment and how if belts are out

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Speaker 1: of a line they will make noise. I don't think

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Speaker 1: that's your problem. I think your problem is in the

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Speaker 1: tension of the belt, not in the alignment of the belt.

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Speaker 1: But I just want to bring up the fact that

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Speaker 1: belts that are out of a line will chirp and

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Speaker 1: make noise because they're wearing on the outside edge of

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Speaker 1: the belt.

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Speaker 2: All right, So the.

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Speaker 4: Insulation of this belt is also a difficult thing. You

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Speaker 4: have to take possibly the radiator out to get to it.

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Speaker 1: Yeah, I'm sure this is a doozy because of what

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Speaker 1: it is. But bottom line, you know, we want to

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Speaker 1: have as many tools as possible. Take a look at

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Speaker 1: dayco at that cricket. You need some sort of measurement

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Speaker 1: device here. I want to see how tight this belt

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Speaker 1: is is not? Then we can continue the conversation.

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Speaker 2: Matt, all right, you're very welcome, sir.

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Speaker 1: I'm unning Nady in the Car Doctor. We're back right

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Speaker 1: after this welcome back run naming the car doctor here. Boy,

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Speaker 1: this hour is just kind of flying by, driving by.

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Speaker 1: Maybe driving by would be more appropriate as this is

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Speaker 1: the card doctor. So let's get over to the phones

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Speaker 1: and talk to that. Hanief in Amherst, Massachusetts, two thousand

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Speaker 1: and four, Chevy Sivilada.

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Speaker 2: Welcome to the Car Doctor. How can I help?

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Speaker 4: Hi? Hi?

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Speaker 3: Ron?

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Speaker 5: This is I have a the engine light comes on

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Speaker 5: on my truck and it shows me a code of

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Speaker 5: P zero one zero one.

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Speaker 2: Okay.

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Speaker 5: The mass airflow sensor.

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Speaker 1: Well, it's it's it's an indication of a mass airflow

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Speaker 1: problem may may or may not be the sensor.

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Speaker 2: Has it been diagnosed yet? Yeah?

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Speaker 5: Every time I take it to the data they can't

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Speaker 5: find it because the engine light stays on, but then

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Speaker 5: it goes away after after a while, right, the.

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Speaker 1: Problem you mean, the problem itself goes away or the

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Speaker 1: light itself goes the light itself gets light.

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Speaker 5: Goes away and when they connect it to the computer,

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Speaker 5: they can't find the problem.

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Speaker 1: Okay, any particular time when this happens, When this when

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Speaker 1: this issue occurs.

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Speaker 5: It has happened while I was driving on the highway

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Speaker 5: as well as early morning when I started. Because when

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Speaker 5: the weather gets cold, I turn it on to warm

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Speaker 5: it up.

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Speaker 4: It comes on.

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Speaker 1: Okay, let me let me let me talk real quick

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Speaker 1: about what a mass airflow does. Mass airflow sensor is

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Speaker 1: measure the volume of air coming.

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Speaker 2: Into the engine.

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Speaker 1: All right, it's showing. It's reporting to the computer. Hey,

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Speaker 1: you know what, I've got my throttle plate halfway open

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Speaker 1: and I'm swallowing x volume of air per second, and

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Speaker 1: the computer then knows, hey, if I'm taking in this

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Speaker 1: much air based on other conditions, I have to give

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Speaker 1: out that much fuel.

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Speaker 2: All right.

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Speaker 1: But one of the other things is this vehicle should

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Speaker 1: also have a map sensor. Which engine is this?

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Speaker 5: It's the four point eight liter Okay, this.

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Speaker 1: Should also have a map sensor. And one of the

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Speaker 1: map sensors main functions on this engine is calculation of

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Speaker 1: the speed formula of the density formula, and it compares

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Speaker 1: it to the mass airflow readings. So you know, it

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Speaker 1: can also be a map issue. That's erroneous, But the

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Speaker 1: onboard computer treats it as a mass airflow sensor. In

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Speaker 1: other words, computer's not smart enough to know the difference

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Speaker 1: between the two and reports a P zero one oh one.

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Speaker 1: What I would love to see is because the first

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Speaker 1: question is, hey, how does it know whether it's map,

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Speaker 1: math or anything in between? And the simple answer is

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Speaker 1: it's looking at fuel trim. Okay, and fuel trim is

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Speaker 1: a measurement of how efficient and how well the air

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Speaker 1: fuel is mixing together.

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Speaker 2: What do you do for a living honef I.

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Speaker 5: Look at the university as the innerative local unity.

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Speaker 1: Okay, So so fuel trim. I'm trying to think of

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Speaker 1: how fuel How I can relate fuel trim to you.

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Speaker 1: Fuel trim is just a mixture. If if zero is

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Speaker 1: a balanced fuel mixture, all right, that's good. If we

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Speaker 1: have to add more fuel to the mixture to get

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Speaker 1: the combustion where we need it to be to maintain emissions,

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Speaker 1: it's going to be plus. We're going to add fuel

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Speaker 1: because the computer can't add air, It can only add

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Speaker 1: fuel or take away fuel. So we're going to add fuel.

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Speaker 1: We're going to open the injectors up for a little

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Speaker 1: bit longer time. If there's too much fuel, all right,

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Speaker 1: we're gonna take fuel away. It's gonna read negative. So

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Speaker 1: where's fuel trim is fuel trim? Is fuel trim negative

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Speaker 1: or positive? So one of the things I would want

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Speaker 1: to do beyond just scanning for codes, and I'm hoping

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Speaker 1: the shop did this, is take it for a ride, look.

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Speaker 2: At fuel trim.

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Speaker 1: If and I'm gonna I'm gonna suspect and think that

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Speaker 1: fuel trim is probably off the mark here, and anything

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Speaker 1: beyond plus or minus fifteen percent either side of zero

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Speaker 1: is an issue. This can also be a problem with

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Speaker 1: intake manifold gaskets as well as vacuum leaks after the

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Speaker 1: mass airflow sensor unmetered, and it will be very intermittent.

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Speaker 1: So let me leave you with this, okay, because the

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Speaker 1: clock's gonna take me. I would go back to the

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Speaker 1: repair shop, ask them to do a test drive, look

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Speaker 1: at calculated load, very important, calculated load, which is a

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Speaker 1: measurement of the mass airflow censer's ability to take in

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Speaker 1: air under under pressure, under duress, and take a look

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Speaker 1: at fuel trim, see what those numbers look like, and

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Speaker 1: then call me back and we can talk further.

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Speaker 2: Okay, okay, thank you, you're very welcome. I'm on Annie

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Speaker 2: in the car doctor. We'll be back right after this.

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Speaker 3: Lisa zero love me, love a lot.

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Speaker 1: Of move me.

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Speaker 2: Nannie in the card doctor.

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Speaker 1: Here, let's real quick it over to John Richmond, Virginia. John,

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Speaker 1: you're out with the card doctor at eighty five five

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Speaker 1: five six nine nine zero zero. How can it helps her?

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Speaker 4: Hi?

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Speaker 6: Ron, I have an H five outback seventy eight thousand

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Speaker 6: miles and I'm experiencing I guess what you would call

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Speaker 6: it torque?

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Speaker 2: Fine, Okay, this is an OH wheel drive subie. Yeah, yeah, yeah.

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Speaker 2: Anybody try to diagnose this?

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Speaker 6: No one has. And I've changed the fluids and I

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Speaker 6: guess you could say, flushed it myself by draining and

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Speaker 6: sewing and draining after driving a while. Okay, and uh

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Speaker 6: like a Lucas oil in it. Right.

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Speaker 1: Well, let me let me jump in here, John, just

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Speaker 1: because the clock's going to take us in a minute

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Speaker 1: and a half. And I kind of I got some

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Speaker 1: specific things for you to try. Have you you got

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Speaker 1: a pencil?

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Speaker 2: Yeah, okay, there's.

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Speaker 1: Gonna be an FWD fuse holder in the engine compartment.

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Speaker 2: For wheel drive. You've done that takes it away, and it.

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Speaker 1: Does take it away. Okay, so we know it's in

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Speaker 1: the trance. You got the same size tires on the

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Speaker 1: front and the rear of the vehicle.

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Speaker 6: Yeah, all new tires that's been gone over. I just

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Speaker 6: want to know if I think I should change the

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Speaker 6: clutches or the solenoid.

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Speaker 1: Which it's probably the clutches in the all wheel drive.

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Speaker 2: Have you seen the bulletin? I haven't seen it, all right, bulletin.

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Speaker 1: Number sixteen DESH sixty four DISH and it's it's actually

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Speaker 1: such a problem that you've got to follow this bulletin

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Speaker 1: very specifically when you change the clutches, because they want

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Speaker 1: you to match part numbers, the thickness of the clutches,

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Speaker 1: and there's some specific things as far as assembly and

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Speaker 1: how they want you to do this. They also talk

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Speaker 1: about when you flush the trans you can add a

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Speaker 1: half court. And I don't know why they call for this,

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Speaker 1: it's it's here say in the industry of mopar seventy

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Speaker 1: one seventy six trans fluid to the trans.

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Speaker 2: See if that improves it as a flushing device.

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Speaker 1: And that's probably because seventy one to seventy six is

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Speaker 1: a real good high friction modifier in it, so you

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Speaker 1: could try that as well. But take a look at

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Speaker 1: that bulletin. Give me a call back next week because

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Speaker 1: the clock's going to take me.

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Speaker 2: John.

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Speaker 1: I'm sorry, I'm monitating. The card doctor mechanics aren't expensive,

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Speaker 1: they're priceless.

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Speaker 2: See you