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Old 11-19-2011, 09:58 PM   #1
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Default 2004 SE misfiring

Hello all!!

I am working on my wife'* 2004 Bonneville SE'* misfiring issue(P0300). I have already changed all plugs and wires. A cylinder balance test show 2 and 5 consistently are not firing, so I changed out the 2&5 coil pack. Cylinder balance test still shows 2 and 5 not firing. What is the next thing to look at or change?

Thanks in advance
Al
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Old 11-20-2011, 09:40 AM   #2
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Sounds like the ICM has failed. Get one from a salvage yard for a cheap confirmation.
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Old 11-21-2011, 09:04 AM   #3
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Probably the ICM, but you might also want to check fuel pressure, and make sure all injectors are firing.
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