agreed, but i'd rather not modify the factory manifold

Yeah, that will not work
The PCM is looking for the signal from the front O2 sensor to determine part throttle fueling.
You will dump the mileage to all hell as well...

Thanks

no, no, i know that... i mean just for WOT tuning, i.e. i'll remove the driver's side sensor (seems to run the leanest ...

Can I remove the driver's side primary O2 sensor and place my wideband there to get PE fuelling or will the missing O2 screw up the trims and ultimately screw up WOT fuelling?

first... just get your normal cruise/driving ltft's dialed in to the proper range of 0 to -2, by making the correct injector slope adjustments....

once that is set, THEN check your WOT data and see if any PE adjustments are necessary...

what i'm saying is when i change PE fuelling from the hand ...

I tried several PE adjustments and WOT they all log the same AFR's so either it's not working or the AFR equivalence readings aren't worth a crap

yeah if you flash after "poking around" it's fine, hopefully they fix it

yeah if you enter the tune parameters after a flash you'll get that code and the fuel gauge will not work, you can clear the code and the fuel gauge will work again however the fuel computer will not (0mpg when stopped / 70mpg when moving no matter what), i let mike know about it and hopefully they ...

well am i correct in saying if i go -5% on the slope to also go -5% in both PE fuel ranges as well?

ok, wanted to be clear on that, i was making slope changes without PE changes and monte regarding our trim discussion, weather changed drastically from when i had sent you those WOT logs and my trims WERE 8% positive when it was still hot friday, however now they're 3 and 4% negative with a -8 ...

sohfast94 wrote:That's what I would do. The injector slope affects "All Fueling" not just WOT.

why is everyone changing their slopes then? so what if you get close to 0% LTFT if it's in turn affected your WOT fuelling, or if they pull say 5% for LTFT do they also pull 5% from the PE fuelling?

It seems to me if you're adjusting the injector slope (telling the ecu the size of the injectors is different!) that you're in effect sliding the WOT fuelling that much more rich/lean from it's intended target

in my experience any time fuel trims were off you'd want to scale the maf / intake ...

If you go into the "tune" menu even just to browse your parameters it makes the fuel level sender stop working when you restart the car, you have to either write another tune to reset the ecu or remove the ecu fuse / negative battery terminal to correct it

also, why is it so lean? mine runs 12.9:1 ...

how do you log to laptop directly?

added some fuel, now it's worse GRRR!! wtf? bad gas?

yeah i considered adding in PE, 4% for both ranges, I want ~12.4-12.5:1, you should never have to add in PE though right?!