93 bonneville 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 09-26-2008, 10:53 PM   #1
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Default 93 bonneville won't start

I have a 93 bonneville that turns over but won't run. I've replaced the ICM,ECM, crank sensor,and the cam sensor. I checked for spark on cyls 1,3,5 and there is no spark. Then I took off the coil packs and checked the ICM prongs. With ignition on lower prongs will light up a 12V light. Upper prongs don't show anything. For about a week, it would sometimes not start on first crank, but it would always start on second or third try. I backed it into the garage and the next morning it wouldn't run. It was running well before this. My next step, because my wallet is crying, is to go over every ground I can find. Am I looking in the right places?
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Old 09-27-2008, 02:09 PM   #2
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In case anyone comes into this situation, I went over all of the grounds and cleaned them. The connection points under the coil packs and ICM weren't corroded, but they had a slight silver sheen. I brass brushed them and put them back on. It works great now! The idle is smooth and all guages are showing good.
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Old 09-27-2008, 02:52 PM   #3
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Glad you found the problem. Sometimes it'* a simple fix.
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Old 09-28-2008, 02:57 PM   #4
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I have a 1993 SSEI Bonneville does anyone have a step by step on how to replace the fuel pump on this car
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