Cause of miss? - Page 2 - GM Forum - Buick, Cadillac, 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.

Cause of miss?

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Old 09-17-2003, 07:14 PM
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For starters, try the coil pack troubleshooting in Techinfo. That didn't work for me, as my last bad coil would only fail after the car warmed up. I needed a megohmeter, but only had one available at work, and didn't feel like walking across our huge plant to get it.

If you know your wires and plugs are good, the coils are the next logical step. A wrecker may let you borrow a set to see if it works for you, hoping that you'll buy them. Most wreckers will sell you the ICM and coils complete for about $100 US, but there'* a world of other opportunities for you if you don't need the ICM.

The 1997 SSEi uses a different coil than all the earlier L27, L36, and L67 cars. I THINK it'* a hotter coil, similar to the MSD. I almost went that route, but the MSD has had good success in our cars (one failure that I know of) and the Accels are known to have problems.

I just couldn't justify spending 100 bones on used coils.
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Old 09-17-2003, 07:16 PM
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Old 09-18-2003, 01:00 PM
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I'm pretty new to this forum so if the following has already been mentioned many times I apologize.

If you suspect you have arcing plug wires & you don't have access to a scope, the easiest way to find out is drive to a completely dark area at night -- no street or yard lights around. With the engine running, open your hood then turn off the headlights and close the door. Look into the engine compartment to see if you can observe any little blue sparks jumping from anywhere along the high tension leads or plugs. If not, slowly raise the rpm to see if any sparks happen anywhere.

If you see any spark at all, you definitely need to replace your wires.

Seems to work best on a damp, rainy night if wires are borderline.
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