i did a 6.0 swap with a 228r cam and i still keep getting a missfire i checked the injectos and the coils plugs wires everything dont know what else to do will a bad cat do this or is it the tune that is doing it if anyone can pitch in and help

 

i did a 6.0 swap with a 228r cam and i still keep getting a missfire i checked the injectos and the coils plugs wires everything dont know what else to do will a bad cat do this or is it the tune that is doing it if anyone can pitch in and help

 

Do you have an actual misfire or just a misfire code? If it's just the code, it may be a result of the aftermarket cam and just might need to be tuned out. If it's an actual misfire, start with the basics, fuel, spark, and compression.

 

What springs did you add? Due to the aggressiveness of that cam lobe more than likely it is the valves slamming shut. I had a similar problem when i did my first cam swap, i ended up just zeroing out the misfires table..

 

well i think i found my problem i had the truck running and i was listing to the coils and one of them missed a spark so it was arcing out so i swapped it will another coil pack and it hasnt miss fire once will we see how is on cold start