Hi all,

I drive a BMW 325Ci 2.5L manual.

About a week ago in the state of NJ there was this HUGE storm, i ended up getting caught driving through it. My car got caught in a a little bit of water and automatically shut off. Assuming it was a safety mechanism i pushed the car out of the water and let it sit for about a hour and a half and let it dry out a bit. I ended up being able to get it to start so i finished driving it home (which was only about a half mile away). I noticed the sound change and feel in the car, and i realized it was deffinately because of misfire.

I just left it in the garage for like 4 to 5 days to let it dry out as much as possible and then started it again and went for a drive, same misfire. I used a car MD my cousin had let me borrow and just as i expected, misfire in cylinders 4 and 6. So i decided to troubleshoot by switching around a the ignition coils and such, they were all working, even the ones where the misfires were. So by then i assumed it was just the plugs, i switched out the plug for 4 and then tested by removing the coil while the car was on, nothing....no change at all.

whnever i remove a coil that works the cylinder stops working and the engine shakes more profusely. Let me remind you i switched ALL the coils around and they all worked in other cylinders. i figured out cylinder 6 was just a spark plug problem because when i disconnected the coil the engine shook more. But when i remove the coil for 4 nothing, no change and that coil works in other cylinders and so does the spark plug...So i dont know what else the problem could be.

Anyone have ANY suggestions? im really desperate here. THANK YOU in advance.

Njay747, August 2012

was the little bit of water deep enough to get into the air intake?I would check your air filter,if it is wet then you may have major engine damage,a compression test may be worth doing also

cdc, August 2012