All 3 Ignition coils died at the same time? (Updated Aug23) - Page 7 - 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 07-31-2006, 05:13 PM   #61
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Switched out the ICM and coils with a set from an 01 Grand Prix - no change.

Sometimes I can hear what sounds like a small pop when I stop cranking. I really don't know what the heck is going on now...
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Old 07-31-2006, 05:20 PM   #62
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Have you checked the compression?
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Old 07-31-2006, 07:22 PM   #63
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Going to now. Gonna go buy a gauge...
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Old 07-31-2006, 09:08 PM   #64
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For what it is worth, I had this problem also except the car would die 10-15 minutes into running and not start again until it was cool. It was the crank sensor.
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Old 07-31-2006, 09:44 PM   #65
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Compression checked:

Front Cylinders:
1 - 175 psi
3 - 150 psi
5 - 175 psi

Back Cylinders:
2 - 150 psi
4 - 160 psi
6 - 160 psi

This was done with the engine cold, since it'* not running :p

I also broke down and bought a scantool - no codes stored.

I talked to a tech at the dealer, and he suggested the next time to do was check the crank sensor as well. I'm thinking it'* either gotta be crank and/or cam sensor, or else it'* the PCM, as I've replaced / verified everything else...
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Old 07-31-2006, 10:20 PM   #66
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I would lean more toward the crank sensor as that is where everything begins.
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Old 07-31-2006, 10:28 PM   #67
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Okay, any tricks or tips to give for replacing the crank sensor? According to the manual I have to hold the flywheel in place to get the balancer off...is there a shield I have to remove to get access to it?
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Old 07-31-2006, 11:00 PM   #68
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Wondering now... would it be worth it to take off the front cover and replace the camshaft sensor and interrupter as well?
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Old 07-31-2006, 11:52 PM   #69
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Glad you've been able to rule out ICM & coils. Several members here have said the car should start without the cam sensor. Changing the crank sensor should rule out any ignition problems. Did you try getting a resistance reading from the temperature sensor?

PS - sometimes we overlook the simply things. Make sure you haven't mixed up the plug wires.
6 & 3 top coil
2 & 5 middle coil
4 & 1 bottom coil
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Old 07-31-2006, 11:54 PM   #70
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Plugs are on good. Yay for labeled coils and wires

I didn't try the temp sensor yet, but I'll dig around in the FSM and find out where it is...
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