Ok... I have had plenty of issues with this truck, and if it doesn't get better soon, its going to find the fast way off a bridge... lol
On to my question....
I recently changed the timing chains, and pretty much immediately afterwards the truck started idling like crap. Engine light was on, took it in to see what new codes I had, and it says that Coils 3 and 5 are not working right. Now, I do believe in bad luck, and I suppose this thing could kill 2 1 year old coils at once, but I'm not so sure. Before I shell out the bucks for these, are there anythings that I should check first? the looked like they were plugged in just fine(I had to unplug most of the coils to get the chains on). I am mostly wondering what the resistance should be on the coils, and which cylinders are which....
One other thing... this thing had a MASSIVE oil leak, and before we began on the chains, we washed the engine. Didn't use a power washer, only a garden hose and a few cans of degreaser. Is it possible that water has gotten in there and would still be there 2 weeks later?
I guess you could take those two coils and move them to different cylinders. If the missfire changes cylinders you have a pretty good idea its the coils. I just had one of mine go and moved it just to confirm. Other than that I can't offer much more assistance. Someone with a little more knowledge should show up shortly.
__________________ Chris JOIN THE BRITISH COLUMBIA CHAPTER CLICKHERE
03 F350 Crew Cab 4x4 S/B
No mods
WHAT NO MODS
Gotta change that.
My wife said "No you can't use the dishwasher to clean hubcaps!"
I said hmmm....parts washer....my mom always said engage brain before operating mouth...now I know why
Water can get in past the boots and into the spark plug passage. The previous owner of my Expedition must have washed the engine at one time. When I changed the plugs a few were rusty like water had been in there. Pull all the coils and blow compressed air in the there. Could be you have some water in there causing some misfires.
the water would still be causing a problem 2 -3 weeks later? wow.... I will try to get the #5 pulled out today. If I understand right, cylinder 5 is the front drivers side, right?
__________________ Chris JOIN THE BRITISH COLUMBIA CHAPTER CLICKHERE
03 F350 Crew Cab 4x4 S/B
No mods
WHAT NO MODS
Gotta change that.
My wife said "No you can't use the dishwasher to clean hubcaps!"
I said hmmm....parts washer....my mom always said engage brain before operating mouth...now I know why
the water would still be causing a problem 2 -3 weeks later? wow.... I will try to get the #5 pulled out today. If I understand right, cylinder 5 is the front drivers side, right?
It is very difficult for the water to get out of there once it gets in. Yeah, weeks, months, maybe never on its own.
If it was forced in under pressure, the boot still seals well enough so it can't evaporate (no vent).
Steve
__________________
Think about it: Ignorance can be addressed through education but you can't fix stupid! ...apologies to Ron White
AS one of the first replies said always move the COP's to different cylinders and see if the misfire follows. Obviously if it does the COP is bad, if it doesn't you have a plug or injector problem, or even a bad harness at that cylinder.
Join Our Site - Its free, quick and easy!
COP/misfire problem!
