How are all your fuel pressures? If you are dropping low or high pressure that could account for the maxed trims.
When I was running E40 blend my LPFP was struggling a bit above 5000 rpm, but it seems a lot better on 93 octane (with my 93 PTF e-tune). Thanks for the advice. I will run some logs after the recently-resetted lambda adaptation settles down. "
My car was real picky about resetting fuel trims. Needed to do it a couple of times with the BT tool before it "took". Not sure why. When it finally did reset (I also reset a few other things, A/F, throttle adapt, etc) everything was glorious and smooth and well within check. Cobb ECU reset does NOT reset these things.
Thanks for the confirmation about the Cobb ECU reset. I will also try resetting some of the other adaptations too. I heard somewhere that switching from E85 to 93 can cause adaptation confusion. "
Well I think I reset lambda adaptations using INPA. Key out. Then started. Seemed fine. No rough idling. Did several WOTs and still have 34 STFTs on both banks 1 and 2. LTFTs went to zero during WTO. Thoughts anyone?
How are all your fuel pressures? If you are dropping low or high pressure that could account for the maxed trims. "
Are you throwing any lambda or fuel related codes? Bad wideband maybe? What type of spread are you seeing from bank 1 to bank 2?
Also, let the car learn and adapt a little bit. You won't get a good sense of trims after 5 miles of driving if you just reset adaptations.
Actually every cold morning since September I get a p29e0 mixture code on bank 1. Occasionally a p0171 system too lean. This does coincide about the time I noticed the trims pegging at 34...hmmm... Once warm it doesn't return until after it sits cold overnight. I am also slightly suspicious that the Forge DVs are leaking when cold but I haven't seen any boost leaks. "
" Compared to old body style X5's like mine that have a 4.6-4.8 as an engine option to newer X's that offer the same or even twin turbo 4.4l, or the ML/SRT8 that offer 6.2l V8's, I need all the help I can get...a supercharged 4.4 will at least get me on the neighborhood, but at 1/4 to 1/8 the cost. "