Hey all. I have a 2005 Saleen S281 (supercharged), fairly stock, with a lean issue under load that I can't seem to resolve. Tune/log attached is from an open loop run. Right at about 3.0V on the MAF, you can see it pull injector pulse width and eventually drifts lean. Ahead of that it's pretty much right on target. Doesn't matter how much I swing the MAF fueling up in that area, it still is lean.
There is also a really goofy blip in the "mass airflow" signal in this area (see picture below). No idea why this is tweaking out if the MAF voltage is stable???
Fuel pump is keeping up just fine - it's a 450lph pump. Injectors are 600's out of a Hellcat which should be plenty. Only expect the car would make about 500hp.
Can anyone help to see what I might be missing?
lean2.png
run7.hpl
RESCALE_OL_FAIL_0013.hpt