Hi, I'm a new user and I have a 2002 F250 7.3L and every time I turn up the tuner to 140HP it only blows a blue smoke, so it made me think there must be oil somewhere it shouldn't be. I already have a leak from the pan so I think a gasket might be screwed up. Will someone please explain the process of replacing that?

 

if it only happens in 140hp then you are getting to much fuel not enough air.

 

Well it did this before I had done anything to the truck, it has always blown blue, never grey, nor black

 

A leak in the oil pan won't have any effect on blowing smoke. What air intake do you have? Do you have gauges? If so, what's your max boost? Who's your tuner? Exhaust modifications?