Hi all, I have a gen3 5.3 flex swapped in to my Volvo 240. 862 heads, Sloppy Stage 2 cam, 4.8 pistons, gen4 5.3 rods, gen3 computer with 1bar SD OS.
After bumping up the idle speed and idle airflow, it starts and idles pretty well.
The problem is that it seems like DFCO is activating too aggressively. I know it's something DFCO-like, because I can hear the injectors stop firing at 1600 RPM, and start firing again after the RPM drops. Looking at all of the DFCO settings in "Fuel -> Cutoff, DFCO", everything looks reasonable.
- MAP is above the MAP threshold (38kpa actual vs. 27kpa entry MAP)
- TPS is above the TPS threshold (4% actual vs. 1.25% enable TPS)
- VSS is below the threshold as I don't have the VSS hooked up (and the car is on jack stands in neutral anyway)
The only conditions met are that I'm above the entry RPM, and the ECT is high enough, but DFCO is supposed to meet all conditions to engage.
What's going on?