A co-worker of mine has an VIII tuned by UMS here in PHX, he has been having problems with his A/F since coming back from Flagstaff. He also blew off an intercooler pipe while driving and kept driving for a few miles until he found a place to stop. From what he is saying, the A/F was going super rich and bogging now its going super lean. Its basically just running like crap, and this isn't the first time this has happened after a trip up north, last fix was to just get reflashed. Any ideas what is doing this?

 

different altitude equals different air densitys

 

^ what billy said

 

/\ 4 sho

 

Oh yeah, forgot to add that he blew off a intercooler pipe, and still drove for a while.

 

But wouldn't it be good when he came back to PHX??