Discussion Starter · #1 ·
ok here is whats going on i have 84 gn that i cant get to idle down. i replaced tps set ok .42 did tap test on maf idle stayed the same. i cleaned iac nad reset still idles very high. ireplaced ecm with 86-87 model still idles high but now the iac doesen't cycle like it did before. any hlp would be helpful thanks.