95 SE won't start - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-07-2007, 06:21 PM   #1
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Default 95 SE won't start

The guy that owned this car said he drove it somewhere and there was a bunch of white exhaust smoke and it wouldn't run again.

The motor is not the original, a 96 or newer out of a GP, car has 130000 miles.

The PCM & ICM have been changed, compression is 150 on all cyclinders, I ground a plug wire and there is spark. There is no water in the oil, there was no water in the cylinders, just lots of fuel. The plugs are literally soaked with gas and when cranked over with the plugs out, the cylinders spray gas, I assume from the build-up in the cylinders because it'* not like the injectors are spraying fuel out of the cylinders.

It turns over but doesn't try to start, any thoughts?
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Old 10-07-2007, 06:33 PM   #2
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What does your fuel pressure look like with the key on?
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Old 10-07-2007, 07:36 PM   #3
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It sounds like an upper intake failure, from the white smoke.

Upper intake failures tend to make the spark plugs all fouled up. How do those look?

How long has it been since it ran?

Are you certain that it'* spraying fuel out of the cylinders, and not coolant? How is your coolant level? Check the radiator AND overflow tank. Low coolant won't prevent a startup, but it might tell a story...
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Old 10-07-2007, 07:58 PM   #4
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Default 95 SE won't start

There is coolant on the manifold from the thermostat housing leaking and quite a bit of it.

I have a new UIM ordered that will be here Tuesday but wanted to see if I could get it running before I change the manifold.

It definitely is fuel, not water on the plugs. The antifreeze is pretty fresh, very green, it certainly would be visible in the cylinders and on the plugs.

I pulled the plugs and cleaned them, same condition. I am going to try new plugs and see if that solves the problem. My understanding is that once plugs are fuel fouled, they will not fire, even when cleaned.
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Old 10-07-2007, 10:00 PM   #5
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Default Re: 95 SE won't start

Quote:
Originally Posted by mike2fix
I have a new UIM ordered that will be here Tuesday but wanted to see if I could get it running before I change the manifold.
Ok, good good. I was afraid you were unaware of the upper intake issue.

If you have fuel, and spark to the wires, then that pretty much leaves plugs.

Unless you somehow have a lack of air (engine is being choked to death). Have you tried cracking the throttle as you cranked it? My only theory there is that perhaps you have a stuck (closed) IAC valve.
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Old 10-07-2007, 10:32 PM   #6
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Have you check the fuel pressure regulator vacuum line for fuel or a fuel smell?
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Old 10-07-2007, 11:57 PM   #7
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I believe the FPR recall included GP'* of that vintage didn't it?
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Old 10-08-2007, 12:03 AM   #8
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i believe the recall was for 98 and 99. the donor motor is a 96.
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Old 10-08-2007, 01:47 AM   #9
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Default Re: 95 SE won't start

Quote:
Originally Posted by mike2fix
The motor is not the original, a 96 or newer out of a GP, car has 130000 miles.
So, we don't know for sure what year it'* from. And a FPR of any year can go bad in the same way. The ones under the recall just did it more than usual
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Old 10-08-2007, 04:59 PM   #10
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ok sry, i missed the "or newer" part. 96 was in my head. woops
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