So I cleaned my throttle body today then decided to clean the engine bay of my truck. I think when I washed the truck I got one of the coils wet. I messed with them and turned them and stuff and blew that water out but my truck is still shaking a ton. I know it has nothing to do with the throttle body because after I cleaned it I took it for a spin and it did great. Then I got home cleaned under the hood and now when I'm in gear (drive, or reverse) it shakes a bunch. I know it a bad coil and that it is misfiring because it did this same thing before when one of the coils went bad. I had a few replaced but some of them are still stock. Do you think if I took all of the coils out an sprayed them with a compressor and cleaned them it will help? Or should I just go ahead and order a new set and put them on. I see that it is pretty straight forward like one plug and one 7mm bolt. But it is a pita to get to the back ones. I just don't feel like spending the money if I don't have too.

 

How long did it run after u washed it cause the heat from the engine should've dried up the water

 

I've been driving it all day and its still misfiring

 

Take the COPs off, dry them out and use di electric grease on them. Blow out all the wells with compressed air too to dry them out. After that you'll know if you know need new COPs or not.

 

Ya that's what I'm going to do I hope that solves it because I don't feel like doing it twice lol

 

Well decided that I am going to go ahead and get a new set of coils and that I am going to replace the plugs as well. I see that is is not that hard. It just takes a while. The only thing I am worried about are the plugs. Getting down in there and getting them out. What socket will I need? And how do you measure the gap and all that?

 

I think I used a 5/8 socket with multiple extensions on my 99 5.4. Gap can be measured with tool from any auto store. Just be prepared to be laying across your engine bay for a while and I had to undo fuel rail bolts and move fuel rail on driver side especially to get to the back plugs. I won't lie, it took a while (long hours) but it was the first time I did it and I replaced the plugs, coils and injectors and even after all of that I still had a bad new coil. You can always buy just one new coil and swap it one at a time with some of the up front ones to see if you find the bad one if you don't have a code reader. It could be multiple coils though since you gave it a wash. Have patience with the plug and coil change. You definately have to set aside time and be in the mood for it. Also, try not to drop the coil screws and good luck

 

you don't need to take off fuel rails and use a 5/8's spark plug socket and make sure the rubber stays in the socket not on the plug use a 4" extension on a 1/4" swivel 7mm socket and a 4" extension on the spark plug socket as well it'll take you a while if its your first time but its time consuming not difficult

do yourself a favor and go into it KNOWING its a PITA and you'll be fine. if you get frustrated walk away or drink a beer

also if a plug doesn't wanna come out try to work it back and forth don't muscle it cuz if you snap it it's a wrap

and do yourself one more favor an take some anti seize and hit the threads real quick on the new ones

 

Yea I know it's going to be a pita. I really don't want to do it but I'm not going to pay someone to do it either. So my guess is it will take about 4 hours. And a lot of cussing. Haha

 

if you were closer to Boston ma I'd have helped you out i just did mine Tuesday took me about 30-45 min

word of advice take a towel and put it under your chest cuz laying in the truck hurts after a while lol