2017 Mustang GT. Pump 94 octane. Just tune / CAI / off road catback. WOT hit in 3rd. 3000 rpm - 4100 rpm added 3 degrees added. 4200 - 7300 took away 3.5-4 degrees. Added 1/2 degree at 6000 another 1/2 degree at 6700 all the way to 7300 for a 21.5 - 22 degree total timing. Normal should be 26-27 degrees I think ? Could it be bad gas ? False knock ? Fuel trims are bang on with the PMAS. I figured with bad gas it'll remove timing from everywhere ? Otherwise it pulls like a freight train. Thanks for any input.
Edit: Upon further review, I think I seen what's going on. Seem on the 'hit' it went +3 and timing dropped to 21.5 Tried to add -3 for a few hundred RPM, then went back +4 above 5000. So that means bad gas if I'm reading it right ?