plow0

0.060 sorry I'm on my iPhone

Atomic

iTrader: (42)

For an NA engine that shouldnt be a problem...

plow0

Well it was. Truck was runnin like complete ****, took the plugs out and they were all fouled beyond believe. Brought the truck to the shop today lets see what he finds. I wish I could just do all my own work

Vortec350ss

iTrader: (20)

I think its another issue that may have caused the plug to go bad, or look like they were going bad... if it was the plugs it would have ran funny from the get go. I still think its a tuning issue, or some sort of sensor. I bet he is clearing out the computer, so for the first few miles it runs fine as it rely's on the tune and is starting to read whats going on. As the truck learns and reads what is happening it will start to run horribly.

Scrapin'4.8

iTrader: (3)

I'd say that's prob the best answer there. Have whoever is looking at it check all around for any exhaust leaks as well. Exhaust leaks will cause it to run rich, too rich and it starts fouling plugs, fouling plugs means no spark, no spark means misfire. Mechanic disconnects battery, PCM resets, changes fouled plugs to new plugs, truck runs awesome til PCM gets code of exhaust leak (or just needs to be tuned!!!) then starts running rich, fouls plugs, puffs black smoke, rinse and repeat or fix exhaust leaks/and or retune.

1BadAsZ