Still stalling on coastdown

[GHuggins]

I made some minor changes based on the one you posted earlier. It should do better but it's possible it'll be like the rest above.

[Alvin]

I looked, but i am using this one over CAN to make sure I dont have any voltage discrepancy.

For now, I put the prop and integral back to stock. It is like the PI controller for idle is way out of whack at idle. You can see it overshoots and never finds home. I already have the spark over/under pretty conservative. Now I feel like I am starting from scratch, lol.

Here is a screenshot of my idle instability. Ive watched countless videos and searched the forums. I guess I wish there was a more straightforward way to dissect the PI controller in action through the scanner, being this OS does not have Idle Airflow PIDs. It acts like Integral isnt active, or it is the other way and is in windup and amplifying the problem at hand. This is Stock Idle airflow tables.

Getting the fueling straight is the first priority. After that things will fall in line and you likely will have little to no other work to do on the idle.

Having the wideband calibrated for a 14.7 AFR stoich and ECM revolving around 14.1 or whatever stoich is just going to bake in all sorts of problems. You got to get that fixed or set the stoich in the ECM to what the wideband is setup for.

[ns158sl]

Ill try setting up the wideband in hptuners manually rather than using the predetermined afr5002.5. As far as fueling changes, i am only using trims. I just left the WB in for WOT fueling.

[ns158sl]

Waiting on HPT ticket to see what is wrong with the CAN wb reading lambda. I have quick question on Injector pulse vs dyn air. It seems the DYNair is matching GMVE but the INJpw is matching MAF? Am I overlooking something or this is normal?