coil pack problem from cleaning the car - Page 2 - 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 12-25-2003, 01:19 PM   #11
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The catalytic converter is making a sputtering noise and the whole exhaust is bouncing around an inch or 2 could this be and exhaust problem
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Old 12-25-2003, 04:09 PM   #12
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No, I think that'* a symptom of your ignition problem. Try removing the ICM and Coils, and bring them inside overnight to dry. Re-dry every electrical connector you can with WD-40 again, including the MAF and TPS harness/plugs (don't get any on the sensors).

I think you still have a moisture problem. Could be a PCM problem if something shorted during your cleaning.

I still don't understand why you haven't had luck extracting codes.
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Old 12-25-2003, 04:16 PM   #13
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i figured that part out my ses light doesnt work! dammit
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Old 12-25-2003, 04:17 PM   #14
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i have also noticed that on the wire harness for my icm on the harness on the wire going up to the firewall there is a missing connection pin. also where is the maf sensor located. there are also 3 cracks on the bottom of the bottom coil, they are directly in the center of it on the bottom in the small circular indentation
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Old 12-25-2003, 11:04 PM   #15
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ok i took off the icm and the coil pack i sprayed them down with wd40 and i dried them off i am also letting them sit and dry overnight i also sprayed down the wireharness that connects with the icm and im gunna let it dry too, ill put it all back together and see if it works tomorow
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Old 12-26-2003, 01:24 AM   #16
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I believe the pin missing from the ICM is intentional. I'd have to check mine to be sure. Do you know of any other 3800'* you can swap coils with for troublshooting? Any GM car with the 3800 will do.

Pull your cluster, and fix that light. We need to see codes. Instructions in Techinfo.
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Old 12-26-2003, 11:32 AM   #17
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ok that didnt work either i know for a fact that all the coils are dry along with the icm and the seal on the chip in the icm is good, so now what should i do. im gunna take it to autozone later and have them hook it up to a scan tool to find out which system is malfunctioning, then i will check and fix, if neccessary all of the connections for that system
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Old 12-26-2003, 12:04 PM   #18
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i have also taken off the sensors that plug in around the throttlebody and checked those, all but one of them were completely dry and the other barely had any moisture at all, just a small tiny puddle on the rubber seal, it does look like a small ammount of moisture got into the connections but it didnt look like enough to be the problem. also, would i be able to hook a multimeter up to some of the sensors to see if they are any good? if so what color is power and which is ground
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Old 12-26-2003, 01:38 PM   #19
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im going to try to fix the ses light to extract codes. the only reason i havent done this yet is because there is a striped screw and i have no idea how to get it out. any sugguestions about what could be wrong with it would help
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Old 12-27-2003, 03:01 AM   #20
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I had a similar problem in my GTP.

1st off I would check each spark plug wire to see if your even getting spark thru the entire sysem (word of advice-DONT hold onto anything metal-it hurts!) Dont attempt this if you dont know what your doing.

If no spark in 1 wire then your ICM is bad-NOT nescesarily a coil (flip flop the coils to make sure the same wire has NO spark), coils very rarely go out. The ICMs dont like moisture at all. I would guess youe problem is cylinder 1,3, or 5 That the weak spot in the ICM. Check it you'll see.
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