Hey all,
The day before yesterday I was playing in a flooded street with my 2000 f-150. I couldn't help it, I felt like a kid again!
Here's the issue... since I had been driving through 1 foot deep water at about 25mph, I think some water crept into places that it shouldn't have. Now my truck runs very weird. It's missing pretty bad. If I have it in neutral and rev the engine, there seems to be no problem, but once I put it into drive and there is a load on the motor it starts to jerk and miss. My dad said something about the coils top of the spark plugs. I'm more old school and not yet familiar with a distributorless motor. Anyone have any ideas or know fixes?
Signed,
One dumb moment

 

Dad may be more right than you think. You could have let some water run down into the spark plug area. The plugs are recessed pretty deep into the heads.

Try using an air compressor to blow the water out the there.

 

Easy but time consuming fix. You got water down next to the plug(s). Are you seeing any codes? Depending on which cylinder is misfring start there first; code will be P304, meaning cylinder #4 (passenger side rear. Cylinders start with #1 front pass. to #4 pass. rear, then #5 is drivers side front to #8 drv. side rear. Hope this helps. Autozone can tell you exactly what codes you are seeing.

 

T ellenberger is right. just pull the coils off and blow around the plugs with an air compressor and then put some dielectric grease on them .

 

I agree with everyone else. I have done the same thing with my 2000 F150 and either during or after playing around with my truck it would start to run like crap. Soon after that I would get the Service Engine Soon light and would find a misfire code. Just pull all the coil packs and dry them out and reinstall them. Just make sure to clean out the actual hole that the coil sits in good too, an air compressor will work pretty good. I think that after a certain time the seal that is suppose to keep out the water dries out and doesn't do its job, so I actually put a bead of silicone around each of the boots when I reinstalled them to help keep the water out. Thats just my opinion.

 

Yeah, every time I splash water up on top of my engine, I foul a plug. Usually, I have to change the plug beause it has a big hunk of crap on it, I guess it's fuel where the plug didn't fire, but I rarely ever get a plug to hit again after I fouled it.