Quote Originally Posted by farmtruc View Post
Since the hesitation went away when pulling disabling the maf, might be a dirty maf or the PCM thinks there is a lean condition or there is one.
A map sensor doesn't respond the same way to a vac leak.

What are the ltrims showing when the ma is plugged in?
You mean the fuel trims? This morning before we did any revisions with the base tune it was showing good, I think one bank was 0 and the other was -3 on the Verus. Also when I sent Vince the first data log he thought the fuel trims looked good, but the truck does act like it is running lean.