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Old 03-12-2010, 05:39 PM   #1
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Default no spark spark plugs

91 Bonneville... The engine is turning, having no problem turning at that. It just won't fire up. We pulled out one of the spark plugs and there is no spark.

What do I do?
Any help?
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Old 03-12-2010, 05:45 PM   #2
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Check over the ignition harness, see if you have voltage at the ICM plug.
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Old 03-12-2010, 05:58 PM   #3
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There'* nothing there, no voltage...
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Old 03-12-2010, 06:23 PM   #4
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You have the old single module/coil pack setup. That can likely be the failure. It is possible for you to swap to the newer style ICm and coils.
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Old 03-12-2010, 06:40 PM   #5
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I believe the coil pack isn't the problem here.... we put another one on from a newer car and it changed nothing...
Do you know if the computer is totally blown, would the engine still at least turn over?
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Old 03-13-2010, 05:52 AM   #6
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Doesn't the cam or crank sensor play a role in whether the coils fire up or not?
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Old 03-13-2010, 08:12 AM   #7
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Inspect the ignition wiring harness for any shorts or broken wires.
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Old 03-13-2010, 11:59 AM   #8
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Did you check ign fuse and make sure you have power there.
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