1badstang1991

thank you, i have a 1991 mustang i cant find the problem .the idle suerges at idle and to start it i have to step on the gas peddle. at idle i can tell that it loads up i have replaced the mass air flow im not sure what to do i checked for vacume leaks and nothing . any help please thanks

1badstang1991

mjr46

run a koer test and check for codes

nightmare90gt

do a base idle reset after you check everything out clean iac, check tps voltage, make sure egr is fully closed