I have a 91 lx 5.0 interceptor. on cold start ups it sounds like it has a chatterbox in it spittin studdering and backfireing. once it heats up and clears out it is fine. I have changed plugs wires dis. cap rotor button mass air sen. throttle bodie, air intake temp sen. Wat do you guyes suggees I have a parts car to try stuff with. o2 sen? coil pack? computer box? it's going carbed in a month or so but i would like to keep driving it until then. any help is appreciated