1995 runs fine...sometimes
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1st Gear
Joined: Jun 2019
Posts: 1
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From: West Virginia
1995 runs fine...sometimes
I got my 95 LT1 two years ago and it ran fine, up until about a year ago. It overheated on me on a trip and I got it back home just fine. About a week after that, I got the dreaded “crank but no start” problem. So I went through everything I could before I changed the distributor. TPS, fuel pump and filter, I could go on and on about everything I replaced. Eventually, the swap had to be made. So I did it. And that didn’t work. So I did it again. That also didn’t work. I got it towed to the Chevy dealership, hoping that they of all places would be able to help (and I don’t have the OBD-I reader). The code it gave was the optispark code, obviously, but they wanted a bushel basket of money to do it, so I took it home and tried one more time. It worked! Or so I thought.
The car runs fine, most of the time. Sometimes I’ll go to start it, and it’ll crank and won’t start. It’ll smoke a little and give me a little rumble after I stop trying to start it, which is odd. When it runs, if I mash the gas, it dies. I’m at a loss here. If the opti was bad, it would do what opti’s do and not start at all. My next thing is going to be the fuel pressure regulator and then the injectors, but after that, I honestly don’t know what to do.
Any thoughts?
The car runs fine, most of the time. Sometimes I’ll go to start it, and it’ll crank and won’t start. It’ll smoke a little and give me a little rumble after I stop trying to start it, which is odd. When it runs, if I mash the gas, it dies. I’m at a loss here. If the opti was bad, it would do what opti’s do and not start at all. My next thing is going to be the fuel pressure regulator and then the injectors, but after that, I honestly don’t know what to do.
Any thoughts?
Le Mans Master
Joined: Oct 2004
Posts: 7,706
Likes: 485
From: Everett WA
C4 of Year Finalist (appearance mods) 2019
Yes, first thought is to "prove" that the fuel pressure is good under all the conditions when the engine either will not start up or when it run but then stalls when you "mash the gas".
If you have not done so already hook up a fuel pressure gauge with a long enough tube that you can tape the gauge to the windshield........ watch the gauge ....what happens to fuel pressure when the car will not start? What happens to fuel pressure when the engine is running and you floor it?
If you have not done so already hook up a fuel pressure gauge with a long enough tube that you can tape the gauge to the windshield........ watch the gauge ....what happens to fuel pressure when the car will not start? What happens to fuel pressure when the engine is running and you floor it?
