Bank1 unstable fuel trim

projectpanda

Update:

Swap bank1 and 2 MAF = no fix

Pulled injectors and swap bank 1 to bank 2 = no fix

No tested bank 1 exhaust side but didn't see any leaks at the test-header flange or header-block flange

swapped the upstream o2 sensor but haven't started up the car to check.

not sure what else I can do after this.

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RHM 75mm TB & ported up/low mani., 3" intakes, Z1 Headers, Motordyne ART pipes, Henko Autolab 3" y pipe & exhaust, Tein MonoSport, SPL F/R arms, endlinks, and tie rods , Eibach sways, Z1 rotors F/R, diff bush., subframe collar, FDF diff brace