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1992 Chevy Truck 1500 running BAD!

Posted by arkansas_girl (My Page) on
Mon, Sep 10, 07 at 15:15

About 2 1/2 years ago my truck was running bad, had new plugs, wires and distributor replaced. Haven't put many miles in that time...maybe 3000...now it's running bad again. BTW, it has 140,000 miles. Symptoms are similar to the way it ran before the new plugs etc. but much worse. The engine power seems to surge(almost die then kicks back in hard) to the point of wanting to jerk when I'm sitting at a light with my foot on the brake. Another thing it's doing is the speedometer flies up and back down often? Weird! Also, some times when I start it it squeals for a few seconds. The Fan Belt is new. If the A/C is on forget it, it will barely run and wants to die. I'm going to be taking it to the mechanic next week and I don't want to be taken to the cleaners so to speak...I'd like a little feedback as to what it seems like could be going on. If you need more info please ask!!!!!!! TIA!


Follow-Up Postings:

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RE: 1992 Chevy Truck 1500 running BAD!

I can tell you there's 101 different possible causes, none of which can be diagnosed over the internet.
Going in to a shop with that accusatory attitude gaurantees that you will never be satisfied, btw. An experienced shop owner or tech can see your type coming a mile away, and will gladly send you away if the shop is sufficiently busy. But I digress...


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RE: 1992 Chevy Truck 1500 running BAD!

Thanks for the personal blasting...very helpful...


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RE: 1992 Chevy Truck 1500 running BAD!

Hello arkansas_girl

Don't pay any attention to that Idiot. He's full of hot air and has no idea what He's talking about. If you take the truck back to the Mechanic that worked on it and explain to him that you havn't put alot of miles on it since HE LAST worked on it, I'd think he would try to fix it for you.


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RE: 1992 Chevy Truck 1500 running BAD!

My truck (1990 Chevrolet 1500) now sits for extended periods of time. When I would go to use it, it was running rough at idle and low speed, I put in two cans of Sea Foam and topped it off with gasoline (34 gallon tank). It now starts and runs much better. You might give that a try before taking it to a mechanic.


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RE: 1992 Chevy Truck 1500 running BAD!

Thanks...that's the first thing I tried was putting a fuel treatment(although not sea foam) and it didn't change the performance of the truck any. But thanks!

I've made an appointment for Wednesday so I'll let everyone know what happens...$54 an hour later...HAHAHA! This shop came highly recommended and stays booked up.


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RE: 1992 Chevy Truck 1500 running BAD!

Fuel pump


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RE: 1992 Chevy Truck 1500 running BAD!

I have a 92 GMC Sierra with a 5.7LT. When I got it, it had been sitting for a few months. It wanted to die at a stop in drive and run better in park. I changed the fuel filter, a couple of vaccuum lines, Idle air control valve, Temp sensor, air cleaner, and many bottles of various fuel treatments/cleaners. I think that's about it. It still does it, but not as bad. I turned up the idle to about 900 RPM's. A little high, but it's not excessive. I suspect a catalytic converter, spark wires, distributor gear...Something mechanical. It does NOT show "Service Engine Soon". I know it's kind of late for this response. But I'm curious to see if you had the problem diagnosed or fixed.


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RE: 1992 Chevy Truck 1500 running BAD!

As I stated above, it was the Fuel Pump. Sometimes it pays to take it to a shop that has diagnostic equipment because even though it can cost more, it seems like you did an awful not of trouble shooting without success. My neighbor was just telling me of all the stuff he replaced on his car only to find out it was a $30 part.

My Service Engine Soon light never was shining either. A lot of the things you mentioned had already been changed not very long ago and very few miles ago. Fuel pumps go out on these trucks often so it's not uncommon, in fact my 96 Tahoe is trying to go out too but so far all it's doing is causing hard starts. But the pressure is failing as I had this tested earlier this year. So I know what the issue is, I just don't want to part with the money until I have to.


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RE: 1992 Chevy Truck 1500 running BAD!

Ok, here's my problem. Truck runs fine and I'm driving down the road the engine light comes on, the engine stops, I coast to the side of the road, put it in nutral it starts right up and I continue down the road. I've had it to the shop and they hook it up the the diagnostic thingy and it shows nothing. I mean really, it's blank. So they drive it around and it finally does the above explained behavior, they hook it up and still nothing. Any ideas? BTW ever since we've had it when you shut it off it ticks for several seconds. Just an aside, weird huh.........


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RE: 1992 Chevy Truck 1500 running BAD!

Gosh...kinda sounds like the Fuel Pump to me on yours too. I'd start a new thread if I were you Shermun...a lot of people don't read anything but the first post in a thread. Both of my Chevy trucks(92 and 96) had the fuel pump go out at about the same mileage...just over 100,000 miles. This is a common issue, I was told.

Those darn intermittent problems are the worst! So frustrating! Mechanics just act like if the diagnostic doesn't find anything they have no idea what to do anymore...whatever happened to mechanics actually knowing what a symptom means? OH how I long for the old days...HAHAHA!


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RE: 1992 Chevy Truck 1500 running BAD!

"Those darn intermittent problems are the worst! So frustrating! Mechanics just act like if the diagnostic doesn't find anything they have no idea what to do anymore...whatever happened to mechanics actually knowing what a symptom means?"

Like all good fairy tales, eventually we learn the truth whether we like it or not.

There is no Santa Claus, tooth fairy, Easter bunny,,, Mechanics don't just konw what is wrong! We have to get to experience the reported problem, and test while it is happening. Anything else is a guess, accurate or usually otherwise!

Sherman, your check engine light coming on should indicate that the PCM is also recogniizing the problem is occuring and should be setting a trouble code. If there is no code, then that reduces the potential causes of your trucks problem to a workable level for a good diagnostic technician. Here are a few questions that the shop will need the answers too.

How long do you drive the truck before it acts up, give an average nuumber in both miles and minutes. This helps the tech set the stage to make it act up for testing.

How quick will the truck re-start? Right away? Five minutes? Ten? An hour? That also tells the tech how much time he has to complete the diagnostics.

Is there anytrhing else that does not work when the truck acts up? Power windows, AC blower, power mirrors, turn signals, anything like that. This helps the tech see if there is a commonality in an electrical circuit.

Does the weather appear to play a role, as in only happens when it's raining, hot out, cold out?

More later, got to get busy!


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RE: 1992 Chevy Truck 1500 running BAD!

i just find your websit i have work on alot of chevy truck i run a shop a shop in il i own one myself and half my family owns one uif u still own one and have any prombles feel free to ask any questions u have


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RE: 1992 Chevy Truck 1500 running BAD!

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1992 Chevy Truck 4.3 1500 running BAD!

I have 1992 1500 chevy truck 4x4, Its always been a good running truck, has the 4.3 liter v6, the problem is, it starts good idles great, goes good a low speed but when i go to get on it it bogs out, if i hold it to the floor it sputters and starts to come out of it but it dosent, ive changed the tcs and the thing that controls my vaccum system, it still acts like a vaccum issue, i cant figure it out. any in put would be awsome, thanks, andy


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RE: 1992 Chevy Truck 1500 running BAD!

I've got a 92 GMC 5.7. I put an 87 5.7 in it and it idles rough. I don't know if I didn't hook all up right or not? I do know temp sensor doesn't work now but other than that. I'm at a loss as to why it won't idle. Idled fine before swap


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RE: 1992 Chevy Truck 1500 running BAD!

having somewhat of the same issue,running bad has no power in DRIVE.Truck runs and sounds great in park even at 3500rpm, after Replaceing the following and set timming; plugs , wires, cap rotor, dist, fuel filter, TBI screens, gaskets and orings. Compression has been checked and is well with in specs. Still no power in drive, any suggestions.


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RE: 1992 Chevy Truck 1500 running BAD!

Hi Keith.

This is a classic scenario for a technician in a shop to come across. We have a list of things that have been done physically, but we do not have any of the data that we need from appropriate kinds of testing. To diagnose this I would not only need to drive it and "feel" the vehicle's power or lack there of. I would also need to observe scan data such as fuel trims, to see if the PCM has to compensate for a fuel supply issue. I would also if appropriate be measuring exhaust back pressure to confirm if the engine is breathing correctly. (an essential requirement to producing power)

I know you did say the compression was checked, today we teach technicians that is an important step to take when diagnosing a misfire, but it is an inapropriate one for a total lack of power at least in the traditional pressure gage style testing. Case in point, if the exhaust is restricted, your compression even on a cylinder that has an exhaust valve leaking could actually measure higher than expected simply because its hard for the exhaust to get out of the cylinder.

The best routine would be to have this tested by a driveability technician. Or you could go ahead, guess, and throw a catalytic convertor on this, or do maybe six or seven other things that "could" be the cause.


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