95 wont 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 04-27-2007, 12:33 AM   #1
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Default 95 wont start

cranks but wont start, has spark at all plugs has good fuel pressure and im stumped
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Old 04-27-2007, 02:01 AM   #2
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Does it try to run at all...even for a few seconds?
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Old 04-27-2007, 09:42 AM   #3
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It has fuel pressure...but are your injectors pumping it?

Remove the connector off the ICM (under coil packs) and gently "adjust" each pin to ensure each pin will make good contact. Put connector back on and try it again.
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Old 04-27-2007, 11:38 AM   #4
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Default 95 Bonneville No start

I had the same problem three times. First was bad ground connections. I believe there were three under the hood and 2 in the cabin by each front door.

Second was a bad crankshaft sensor. Third was bad camshaft sensor.

The first go around I spent some money replacing fuel pump, fuel pressure regulator, fuel pump relay and fuel filter. All were good but since I started I just replaced them.

Let us know how you make out!
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Old 04-27-2007, 12:29 PM   #5
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Older Bonnies can get seriously flooded. This may be worth a try:

On our old Series 1 (the '90)(and I would think the Series II also), you could still use the old trick of pressing the accelerator all the way to the floor, and keep it there while cranking to start. Only do this for 5-8 seconds at a time, of course.

Have you actually pulled any of the front three plugs to take a look? I know you said you're getting spark to them, but make sure they nice and tan and clean and dry and gappped correctly.

Good luck!
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Old 04-27-2007, 01:39 PM   #6
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i replaced all the plugs but they didnt look like they had any fuel on them because there wernt wet at all
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Old 04-27-2007, 01:58 PM   #7
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Quote:
Originally Posted by Slug
Older Bonnies can get seriously flooded. This may be worth a try:

On our old Series 1 (the '90)(and I would think the Series II also), you could still use the old trick of pressing the accelerator all the way to the floor, and keep it there while cranking to start. Only do this for 5-8 seconds at a time, of course.

Have you actually pulled any of the front three plugs to take a look? I know you said you're getting spark to them, but make sure they nice and tan and clean and dry and gappped correctly.

Good luck!
Series 1 bonnes do not have a flooding issue according to the experiences of the club.
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Old 04-27-2007, 04:37 PM   #8
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Check for fuel injector pulse.
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Old 04-28-2007, 12:02 AM   #9
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u said spark, but what color spark. cuz if its red or orangish color, theres a problem. could be low batt voltage. bad ground, bad coil.

and did u check only one wire for spark? if so check three (one cyl from each coil pack)
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Old 04-28-2007, 12:06 AM   #10
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oh and if u saw any spark. then i dont think its the crank sensor. if it were bad ud get no spark at all. and prob not the cam sensor either. if that was bad it will usually run, just run poorly.

edit: also, on second thought, the ground for both the cam and crank sensor are on the same circuit, so i guess maybe if the cam ground was bad, the crank ground may be too. but not that likely.
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