I just put the 5.4 in place of my 4six in the Expy. I'm using the 4.6 computer so therefor I am running the coilpacks, not COP's. The truck first ran like crap wiht the 5.4 and would bog down when coming to a stop. I mean down rev to about 450 RPMs, but now it doesnt, I guess the computer relearned itself???


anyway, what do I do about just gettin a stock 5.4 tune? I really dont want much of a performance tune, just something to get this engine running 100%. . . New to the tuning/chip world. . .