97 Bonneville SE - Engine misfiring/Stalling - 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 10-14-2010, 10:49 PM   #11
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" And crimp connectors tend to fail after a while."
And guaranteed it will fail at the worst possible time . Or maybe that is just my Karma!
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Old 10-15-2010, 03:30 PM   #12
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hmmm any ideas as to how to proceed? I have a whole wiring harness and after checking it I was mistaken and the only connector cut is for the O2 sensor which i actually cut and spliced when i changed the engine any ways. (long story involving idiot brother in law and multi hundred pound engine sitting above my head)


Change the connector or the harness?. I also have the ICM off other engine, glad i stripped the engine and kept all the parts i could think to keep lol
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Old 10-15-2010, 03:39 PM   #13
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Best to swap out the whole harness. But if you have shrink wrap and can solder good, you can replace the connectorl
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Old 10-15-2010, 05:42 PM   #14
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Thanks guys. Im going to take care of it this weekend and let you guys know what happens. Thanks for all the advice!!
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Old 10-16-2010, 05:39 PM   #15
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Quote:
Originally Posted by SignOfZeta View Post
P1362, as the code says, means your ignition system has low voltage. All of the spark power comes straight from the relay center into the ICM. Now, two things you probably don't know about your ICM (unless you pull out an engine control schematic like I just did):
  • The tachometer is driven by the ICM.
  • The cam sensor plugs into the ICM.
Hey, there'* three of your issues right there!

Now, before you run out an buy a new ICM, let me stop you and say that your fuel injectors aren't connected to it. However, if the computer is seeing erroneous readings and trying to adjust fuel injector timing to match, that could cause the P1200 code.

Assuming that your battery cables, the ICM'* 20A fuse, and wiring harness are all good, I'd look into the ICM. Thoughts, everyone?

Dude I would seriously by you a beer lol I changed out the ICM with another one i had, replaced the wires on the spark plugs for good measure. And after almost 100 miles of driving still no issue!!! I made sure to clean the plate under the icm real good and put a coat of Di-electric grease on it, i assumed this was a ground and the plate had crap all over it.

I really appreciate the help from all you guys. Things running better then ever right now.
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Old 10-16-2010, 05:43 PM   #16
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Good to hear. That'* why we are here. Corrosion is never a good thing. Even a little cn cause big problems. And it'* a pain to track down.
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Old 10-16-2010, 08:03 PM   #17
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Quote:
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Dude I would seriously by you a beer
I accept PayPal.

Seriously though, just another day in GMForumland.
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Old 10-17-2010, 09:03 AM   #18
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Don't forget about the little ground wire beneath the ICM plate. As many times I have pulled my engine, that = the number of times I forgot to connect that little wire.
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