engine problems... any ideas

[jetboat]

it finally threw a code on the way to autozone. They threw the ob2 scanner on it and sure enough "cylinder #8 missfire" Of course thats the cylinder thats at the back under the fuel rail. Some how I was able to change it out in about 15min... took me 45 mins to change the plug on that cylinder before (most of it getting that stupid hold down screw back in). When I pulled the coil pack it broke right where the plug connects to the coil.

Truck is running smoother than it ever has.

Thanks for pointing me in the right direction... just really odd it would do this right after changing the thermo.

[Duuuuuuuude]

nevermind...lol

[BJoe]

Dad suggested that you may want to double check the gaps on your plugs too Jeff.

[addictedtonitro]

Originally Posted by BJoe

Dad suggested that you may want to double check the gaps on your plugs too Jeff.

gap schmak it's a ford. Just make sure they wern't knocked closed and it'll run. lol
I always recheck the gap at least make sure it's close. these stores drop stuff etc.
Wish I woulda seen this earlier or ya coulda called me. I woulda told ya that ya goof.

[jetboat]

Originally Posted by addictedtonitro

gap schmak it's a ford. Just make sure they wern't knocked closed and it'll run. lol
I always recheck the gap at least make sure it's close. these stores drop stuff etc.
Wish I woulda seen this earlier or ya coulda called me. I woulda told ya that ya goof.

Did eitehr of you guys read where I said I got it fixed and it was a cracked coil????

[addictedtonitro]

Originally Posted by jetboat

Did eitehr of you guys read where I said I got it fixed and it was a cracked coil????

yes
Thats why I said you shoulda called so I could tell you that you had a bad coil. Worked on fords most of my life.

[BJoe]

Originally Posted by jetboat

Did eitehr of you guys read where I said I got it fixed and it was a cracked coil????

Yea, and Dad still suggested checking the gap, guess his work truck with the 4.2l V-6 has that issue....frequently.