Diablosport Forums

Thank you for reading this. If you can help me I would really appreciate it.

Vehicle is a 2010 GMC Sierra CrewCab, SLE, 4x4, Z71, 5.3L FlexFuel

Using DiabloSport Intune I-1000

I just ran out to I-25, to log a run for my "final" injector slope adjustment. It was about 7 miles each way. When I came home and ran the log through
DSLogRedux the north run said increase slope 1%. Great right? Then I ran the south run it wants 4% up.

Both runs were done within minutes, same stretch of Highway, same weather. The truck was up to temp. (30min. of driving before logging).

What gives? What am I not doing right? This is my 12th or 13th log, and the LTFT will not sit still.

Thanks in advance for pointers on things to check or replace, or any suggestions on things to test.

I'm running out of ideas (and hair).
Thank you

you're chasing your tail man..

ltft's will change based on weather, intake air temp, etc.. won't always stay the same..

plus, Every time you install a tune, all of the learned items like idle, airflow, fueling/fuel trims, emissions readiness tests, etc. all get erased/reset... It takes days/150+ miles to be put on for everything to be relearned by the ECM/TCM and settle back in again before you'd be able to do a data log.

Sorry, I should have made a new post.

I just want to have the injector slope stable. Every log I take suggests that an adjustment needs to be made.
Shouldn't it settle down and run fairly flat? Why would 2 logs, taken minutes apart, have such different adjustments (+1 +4)?
The average LTFT range should be between 0- -2 correct?
Why am I not able to achieve that?

I have been going between 175 - 200 mi between logs. I was at 213 when i took the last two.