Re: Boost Problem
Ok, wow. I just got done looking at the file and it told a lot more than I thought it would.
3 words: LEAN LEAN LEAN! The higher the injector BPW (fuel demand) gets, the leaner the truck runs. Here it looks like you're gently leaving a 0 MPH stop to reach a 31 MPH cruise. The STerms (
short term fuel trims) max out at FULL LEAN (see the blue line flatline when it Hits The Roof??) Look at your O2 mV (red line), they drop to basically zero (anything consistent below 100 is totally lean, nearly a total lack of fuel).
According to this run you never went over 31 MPH and never more than 1/3rd Throttle.. I thought the problem was under boost? Regardless it's obviously appearing to be a lean condition so I'd start by verifying the fuel pressure and make CERTAIN your AFPR is getting a solid vacuum signal, maybe check the spark plugs to make sure they haven't suffered damage, and then wondering about that fuel pump.
If you need further diagnosis do you have any Datamaster files with 100% WOT? (Not that I would go out making new WOT runs with it so lean at this point - I wouldn't go into boost at all until you get this fixed!)
It has a Code 44 O2 Lean like you said. The problem won't be solved until you find the cause of that code. The ECM is trying to tell you there's a problem, as loud as it possibly can.
