Went datalogging tonight and had the most werid result that I would like to share...
Set up is HRC stage 3: JE/Eagle, SFMU, ML, and 270cc at 5psi actuator.
all other things normal: Coolant: 198-203* Intake air: approx 100* +/- 5 Short trem fuel trim: +/- 3% (toward zero) Long term: -21% EGT at WOT 1500 EGT at crusing 1100-1200
At WOT off the launch, I get this weird fuel cut problem. It mainly occurs between 4K-5K RPM. I know it is not the ML because it was just cleaned.
I was fortunate enough to capture this little fiasco on my cheap RRE logger program.
WOT O2 voltage is 0.94-0.98 (a bit rich) across. However at the point of stuttering, it dropped to 0.135 and pick up again 0.92.
Ignition timing ranges from 16-19* under WOT, but at the point of stuttering it is a consistant 16.5*.
So my question is WTF is going on...there is no timing pulled at fuel cut, but obviously there is a lean condition...
Anyone care to comment. I wish I know how to post the graph...
