LS1INSIDE

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

P Mack

iTrader: (6)

Maybe you need some dielectric grease on the injector connectors. I would check your plug wires too, maybe try to get it to do it when it's dark out so you can see if it's arcing.

SSpdDmon

iTrader: (10)

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.

LS1INSIDE

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?

black_ws6

Sounds like water to the PCM. Just cover the top so the water runs off and you'll be fine.

LS1INSIDE

btw i got new wires because i thought it was the problem new plugs etc. problem still persists after every single wash

wrencher

iTrader: (2)

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.