1991 bonneville stalls no code - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-12-2011, 07:04 PM   #1
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Default 1991 bonneville stalls no code

had a code 41, replaced cam magnet, switch, chain and gears, ran good two days later got a code 42, replaced coil pack, now it will stall while driving, restarts and seems to run fine, but no service engine light
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Old 07-12-2011, 09:31 PM   #2
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Are all the wires that hook up to your ICM intact?what kind of shape are your battery cables in? was the ICM replaced ?
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Old 07-13-2011, 06:34 PM   #3
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no i have not looked at the icm, is that directly under the coil pack? would'nt that give me a code 42 also, wich is automatic spark timing
battery wires look good
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Old 07-13-2011, 08:15 PM   #4
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..41 cam sensor circuit fault, igntion control circuit fault

so if you have replaced cam sensor and all the wires for the sensor and ICM look good it is the ICM ive been here with the same issue
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Old 07-16-2011, 09:05 AM   #5
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started to replace icm, i pulled on number 3 plug wire and the electrode pulled out of the coil pack,
(so much for the made in mexico junk) got another coil pack, but before installing took off icm and ground wire attached to icm bracket cleaned booth ground, icm, and icm bracket to feel at ease of having a good ground connection, replaced new coil pack started car and let run till engine got hot then drove 10 miles in it with out a stall condition, so far seems my problem is fixed, (knock on wood)
thanks for the response
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Old 07-16-2011, 05:52 PM   #6
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Not a problem glad to hear its going good make sure if it comes back to let us know!
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