#2 Misfire after cleaning Engine Compartment
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#2 Misfire after cleaning Engine Compartment
I cleaned out the engine compartment with Engine Brite and hosed it down today. After getting it pretty good and cleaned I let it dry for a bit and then started it up. I imediately noticed that the engine was running pretty rough, especially at idle and about 45mph. The check engine light came on and I hooked up the OBD II scanner and it says the #2 cylinder is misfiring. Everything is pretty dry under the hood so I wouldn't think that water would still be interfering with anything. I was thinking that the spark plug is shot, but before I go ahead and replace the plugs. Does anyone have any ideas of what it might be, so I don't have to go through the process of replacing the plugs?
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Have you tried letting it dry for a little while longer? And is the miss still noticeable? Any time water gets into some electrical connections, there is the possibility of screwing things up...but 99% of the time those problems resolve themselves when the water dries up. I'd try a blow-dryer if you don't have an air compressor to get it really dry. Even once the miss goes away, the light will stay on until it's either reset or until you make 2 or 3 trip cycles...which is basically x amount of time under 30, x amount of time accelerating, x amount of time between 30 and 50, x amount of time doing this and that...so depending on your driving habits, it could take a day, or it could take a week for it to turn off on its own.
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Originally Posted by RyanD2291
Its been drying for about 4 hours with the hood open and under the sun. It's pretty dry, and checked all the wiring around the plugs and injectors. They are connected and dry. I was gonna wait till tomarrow morning to try it again. Could water have shorted out the COP?
Disconnect the battery for 15-30 min,drive it and see if it helps,if not you will prob get that code again.
Last edited by Kevin24; 03-29-2007 at 07:21 PM.
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This is a VERY common problem associated with wetting the engine. All you have to do is remove the #2 coil and dry it out. Remove the spark plug and dry it out. Put it all back together and everything will probably be ok.
If you still get the missfire, you may have ruined the coil. But drying it out almost always fixes it.
If you still get the missfire, you may have ruined the coil. But drying it out almost always fixes it.
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I just tried running the truck after letting it sit overnight. The engine isn't nearly as rough as it was, but I can still feel it vibrate more than it should. Especially when I go in reverse. I'm gonna go ahead and change out the spark plugs and the coil plug for the #2 cylinder (don't have the money to do all of them).
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Originally Posted by RyanD2291
I just tried running the truck after letting it sit overnight. The engine isn't nearly as rough as it was, but I can still feel it vibrate more than it should. Especially when I go in reverse. I'm gonna go ahead and change out the spark plugs and the coil plug for the #2 cylinder (don't have the money to do all of them).