I have been tuning a 05 6.0 w/ headers, CAI, Flowmaster ex, and a TB spacer.
While attempting to tune Idle, I notice that the IAC stays at 310, and I am commanding 550 RPM's I am seeing 750-850rpm's?????

Using a WB (LM1 behind the cat) when I put the truck into SD and tune the VE via WB% error. When changes are made to the VE the STFT's increase while my WB shows 14.4 or so.

So after getting the VE within -/+ 4,turning back on the MAF the truck will barely Idle. Truck runs very lean upon startup with the MAF back on?????

Any Ideas????

chris