swalker332

i have a miss in my 91 gt and i have done a complete tune up on it ( plugs,wires, cap, rotor and fuel filter) and that helped a little bit but it still feels like it has a miss to it. does anyone know wat this could be?

MikeVa

At idle or all rpms?

swalker332

at idle

MikeVa

Clean the MAF, IAC and throttle body. What are the plugs gapped at?

swalker332

.054 i will clean it

nseoi

check compression and run some gas treatment in your tank. after what you did i cant think of anything else

mjr46

If you have a miss at idle but none at higher cruising rpm's I would suspect a vaccum leak....you can check all vaccum hoses and or a possible egr valve partially stuck open due to carbon build up on the pintle but using carb cleaner spray all vaccum hoses and intake gasket mounting areas and listen for change in rpm's that'll indicate a leak

swalker332

thanks guys ill try those ideas.