I have the following hardware installed for an L86 8L90 swap into a 67 Camaro.
L86 with: LT2 intake, Spectre CAI from 2016 SS Camaro, Speed Engineering (short) headers, 3" exhaust with X pipe
8L90 stock
Fuel System: Aeromotive 340 in tank pump, 30-90 adjustable fuel pressure regulator controlled by relay from FPCM signal wire
Lots of surging at idle and boggs down really low at times. When throttle is depressed, RPMs hang at 2500-3000 and stay there before eventually going back down.
I noticed that in the fuel system in my tune, FPCM is selected which doesnt seem right. Anything else Im missing that is off with the base tune, the tuner did for me?
camaro tune.hpt