jsmith309

Flashing CEL, Smoke at all rpms EXCEPT in AFM. I know cylinders 1 4 6 7 or AFM cylinders. I am thinking the is still active on cylinder 6 full time. Stuck or something. I also had the code for the oil pressure switch yesterday, replaced it.. Cleared the code and hasn't came back. The p0306 code for the misfire is still there though. I changed that plug (oil fouled) and still no difference. The engine make a noise at idle and idle only almost sounds top end and like a metal plate is loose. I knew I should have got AFM tuned out sooner.

supercatxr7

iTrader: (5)

Cracked piston will cause misfires and smoke..hope that's not your problem.

jsmith309

Oh no..

fieroguru

iTrader: (1)

Do a compression check on all 8 cylinders.

Mr.Angry.GXP

i had a similar issue, check your coil packs, i had a missfire on #5, switched it to #1 and it happened again on #1, checked for spark and continuity and replace the one pack... never one issue since

x11 nut

iTrader: (3)

Yes, start with the simple stuff first!

jsmith309

Ended up being a broken lifter.