I'm losing hope on this issue, I cannot get MT to communicate with me over my issue and aid me. I guess the warranty on his tuning has been off for a while. (this is an old issue, since the rebuild I've had this issue, 5 years?)

Anyway, to the important issue


I have persistent rich codes, p0172/p0175. I can clear them, reset pcm/upload tune, try new o2's and within the quarter tank I'll have a code thrown again, usually bank 2 first.
Wideband can show 14.6 for most of my drive if I'm very light on the throttle, soon as I hit boost (or thereabout) the wideband typically drops straight to 10.x, 11.x if the weather is right. Fuel injectors were serviced, flow tested within 95% of spec, fuel pressure is not spiking.

I'm in desperate need of help, I do not have a local tuner for Fords except Rods Cars and I cannot trust him after our bad blood incident over a transmission (not exactly our fault, he went to another local shop and they did the poor quality work which resulted in me seeking refund from him)


Truck info:
4.6 pcm (IMP4 process code), xcal 2 tuner for supercharged 5.4L.

 

It is most likely going to be in the tune.

Best bet is to get with a good tuner and get some logs to him so he can make some adjustments for you.

 

Tuning files are locked, so any tuner besides Mike@TP would have to start from scratch after looking at the logs, correct? Sorry its been so long since I've tried to deal with this issue I've forgotten most of what I did gather info wise.

 

Have you tried cleaning or replacing the maf?

 

Try calling Mike Butler at 5Startuning.com. He can probably help you and if he can't he will not BS ya'.

 

Yes, I have 2 90mm OEM Maf's. Same performance with both, oddly you reminded me that I never did get a straight answer on the VRef wire for the maf. I read somewhere I was suppose to get 5v there, I do not but there is continuity from wire end to pcm plug. Even with 2 aftermarket PCM's and the OEM unit.



Thanks for the recommendation shotgunz, I'll have to find a laptop for datalogging again. But I can always shoot an email and quiz first, appreciate it!