Having alittle problem with my mustang its a 91 Gt all stock except for the exhaust. I have tried to pull codes with the car off and with the car running and I get none. I have changed cap and rotor, egr sensor, new plugs, no vac leaks, new tps, fuel pump sounds good, fuel filter is new, and that I know of everything is ok?? The only other part that I think it might be is the distributor but before I go out and spend $100+ just want to make sure if any of you have experienced this in the past and figured out what the problem was thanks.