Car acts up after wash!!! Help
Thread Starter
11 Second Club
Joined: Feb 2003
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From: WESLACO, TEXAS
Car acts up after wash!!! Help I can't seem to catch this nasty gremlin, Here is the problem everytime after I wash the car it seems to start sputtering and my whole bank2 goes down sometimes it's just cyliner 6 goes dead and raw fuel starts pouring out my exhaust. after a couple days it goes away! and the car runs great i'm guessing it's after it dries up or what not. and it happens again after I wash my car. I thought it was my pcm that is getting wet could this be it? I tried dielectric grease on the harness but I don't think I put enough has anyone ever had this happen to them before? btw when i run into this problem I threw p0300 misfire code and sometimes it throws the injector control circuit code?
Eddie
Eddie
I'm assuming you're not spraying the engine compartment directly, right? First thing I would check is the black plastic/weather stripping at the bottom of the windshield in front of the passenger seat. Make sure it's draining the water away from the PCM. An SS came into a dealership near my house. The guy said it acted up every time it rained. Turned out the water was draining off of the windshield onto the PCM. I believe there are custom covers you can buy to cover the top of the PCM or you could fab one up your self with a little sheet metal. Either way, that's where I'd start to look for your problem. Then, I'd move to what's directly above cylinder 6 and it's electronics.
Thread Starter
11 Second Club
Joined: Feb 2003
Posts: 523
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From: WESLACO, TEXAS
Well the reason why I said cylinder 6 i'm thinking that the water is pouring directly into that certain pin, I was searching for the pin-out of the pcm but I couldn't find it but yeah i ussually cover my pcm with a plastic bag but i guess it still leaks down on it cause it only does it once in a while, no i don't spray my engine, it's only when it rains or wash the exterior of my car not my car directly. The reason I didn't want to fab one up was i'm worried will the pcm heat up or burn up from being enclosed?
Launching!
Joined: Jun 2004
Posts: 264
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From: Belle Vernon, PA
Originally Posted by LS1INSIDE
The reason I didn't want to fab one up was i'm worried will the pcm heat up or burn up from being enclosed?
I would check the harness also. It could be chaffed somewhere & the addition of water causes a problem that is otherwise not present. You could put a cover over the PCM to deflect water away from it. But if you are sealing it while washing, that might suggest the problem is elsewhere.
