CAN I damage my engine in any way on the pully tune?

[STEVEG]

U 7158 ford lightning 2003.
I have an old predator that i couldn't download any new stuff , becouse mu comp. says it con cant find the tool when connected. . So anyway when i set it to the first tune (diablosport tune) the truck knocks at around 80mph and under hard boost, then when i tune it to ( pully tune) the truck runs fine. So my question is will i harm my motor iny any way in a pully tune even if i still have my O. E. pully from the factory?

P.S. the only mods are a flowmaster cat back, and an airraid air filter (cone style)
your expertise will be greatly appreciated.tanx.



steve g.

[cole]

Well the truck would run really rich since it would be compensating for a different target a/f.. What octane of fuel are you running?

[SCGt94]

pulley tune probably pulls a few degress of advance out, normally around 2, hence why your probably not detonating anymore when you run it. How many miles? And like cole said, how octane are you running?

[STEVEG]

Sorry i didn't mention I'm running 93 oct. and the truck has 97 k. and I'm also sorry i coudn't get back any sooner,(out of town)