Originally Posted by snrusnak
no errors/engine lights?
you didn't mess with your cats or O2's when you did you muffler delete did you?
did you change any other settings with the tuner?
I think you said you have a drop in filter....when you did this did you maybe for some reason unplug the IAT sensor? Make sure it is plugged in...
The previous owner did the muffler delete and filter. The Cats are stock and the o2 sensors look un touched. The IAT sensor is plugged in. No CEL and even SC said i had no codes. I changed my transmission setting up/down shift to the "Superchip Setting". And running 91 tune. Other than that no, havent changed anything.
Maybe run some seafoam? New plugs? Maybe unplug my battery and reset pcm? Get it reflashed from dealer? It is a 4x4, but still shouldnt my numbers be lower?
Maybe clean my filter... But if it was that dirty to effect my times that bad, wouldnt my mpg had been lower? MPG havent changed since I owned the truck.