check engine light flashed 3 times and came on - Page 2 - 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 11-11-2009, 11:05 AM   #11
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I had the exact same problem (but passing a different car).

Mine ended up being a P304.

When I pulled the plug, there was the white 'trail' from inside the plug wire leading out indicating that there was some arcing going on. The plug itself had a black line running up the side, looked like a crack.

Check your plugs and wires and replace if necessary.
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Old 11-11-2009, 11:16 AM   #12
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That black line is a carbon trace, the spark will follow that line to ground because it'* easier to do then to jump the air gap.
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Old 11-18-2009, 06:55 PM   #13
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just an update engine light went off all by its self
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Old 11-18-2009, 07:02 PM   #14
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KSR - in St Marys?
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Old 11-19-2009, 08:04 AM   #15
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You do realize the issue didn't fix itself, it is still present. Most likely enough drive cycles occurred w/o an issue (you stomping it etc) that the light turns off.

If you'd like to pull the codes and solve the problem, we'd be happy to help guide you.
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