Hi guys, a couple of questions here....
- What was the reason the the tuning? IE. have there been any mechanical mods?
- Was this issue occurring prior to tuning or only after?
As you probably know, B1602 only comes into play once the ECM switches from cranking mode to idle mode. I've seen a few tunes that have the table set as in the )* tune posted, as well as others that have significantly higher values. For example, I'm currently running values of 1.8 in the colder ECT cells in my tune. I'd be using the stock values for the OS in use as a starting point, adjuxting by increments of maybe 10%
Airflow for cranking is managed in B1832, and a couple of other tables (missing in the 08 tun file) B1833 and B1834, set when the ECM switches from cranking airflow to idle airflow.
If the Engine starts and idles OK when cold, then I'd take a guess that the basic airflow tables should be OK. I must say though, that the cranking air flows in the 08 tune look pretty high though. If the min idle air flow is set to 7.5gm/S, I'd have expected the hot cranking air flow to only be a couple of gm/S over that (other mods to the engine may change this).
Do you have a log of the issue that shows IBPW as well as spark, MAP, RPM, ETCTP/TPS ?
Simon.