• Hello there guest and Welcome to Fox Body Mustangs forum, This forum is intended to be used by enthusiasts of the Fox body Ford Mustangs (1979-1993)!
    To gain full access you must Register. Registration is free and it takes only a few moments to complete.
    Already a member? Login here then!

Surges at idle after maf upgrade..


New Member
Hello, thanks for the add. 87 Lx SSP, did mass air flow mod, A9L with supercharger, car was tuned and runs great but does have a surge at idle or at red light. New fomoco iac, tuner is saying the ecu don't know its surging...when viewed in laptop. Sure yall might want more info how car is set up but does anyone have experience or have seen these cars do this? Thanks for any feedback!