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Old 08-23-2010, 12:44 PM   #1
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rfortier1796 is on a distinguished road
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Default Need some help with ICM, code P0304

My girlfriend's Saturn is running pretty rough, so we pulled the code and got a P0304. Started with the basics, checked the plugs. Cylinders 1-3 were ash white all the way across, so there is some detonation, cylinder four was completely black. Swapped the plugs for some OEM ones, still have the same issue. Based on the best of my research, it looks like the ignition control module problem common to the 2.2 Ecotec.

I've done all the searches, I'm just looking for a good DIY on this part. I hate to say it, but seeing as that it is my girl's car and not mine, I don't want to dive head first in without knowing what I'm doing. That is pretty sad considering the work I've done on other cars. Anyone have a decent walk through on replacing it? It looks to be a straight forward plug and play job, but I want to make sure all I need is just the new ICM (AC Delco part D1968D, ~75 overnighted to us) and nothing else for it. Thanks in advance for any help.

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