Noticed in my logs, at steady throttle, my A/F's randomly spikes lean for no reason.. And can feel it hesitate at the point as well.

Changed

-injector clips/caps
-Aeromotive AFPR
-02 sensor
-swapped ECUs (both are from ECM tuning)
-new fuel pump (wally 255 HP)
-plugs/wires
-CAS
-coil pack
-transistor
-throttle shaft seals
-eliminated MAF, now speed density


Checked voltage at the pump, 13.8 with car running, of course i only checked at idle.

Checked the tcase and stuff as i thought it was drivetrain .. nodda

SAME PROBLEM