No, no more esplain'n. PICTURES are what we need. Good ol' pictures.

:p

 

He's right, if the PCM is adding fuel Long Term it will affect the fuel enrichment when it goes into PE. At least in my understanding... which is limited

 

everything i have read says you want a slightly negative ltrim most of the time and 0 at wot, that is the first step for your tuning. have you hooked up the wideband yet to see if your way rich or something.

about the flex fuel injector, are you sure it will fit? i ordered a flex fuel injector out of something like an 01/02 5.3flex fuel vehicle just so i could see what it looks like and it was diferent from the truck injector. i will see if i can find it later and take a pic.

lets hear those times, or at least PM me.

 

Just fired up the Wideband (I really like it). I didn't use the logging software, just made some WOT runs holding the handheld. As I expected, I'm looking good with 12.5 A/F until just over 5000 rpms, then its leaning out to about 13.2 over 6000.

At this point, I'm physically seeing lean conditions, and my injector pulse widths say I'm past 100%. Time for injectors.