i have a 93 thunderbird sc auto. If i drive the car normaly theres not a problem and it idels fine but when you put into it and gunn it, it misses horabliy sounds kinda like a sputtering sound and shakes the whole car. iv changed plugs, wires, fuel filter, MAS, TPS, pcv valve, ingnition modualr, coil pack, nothing has worked and i got the fuel pressure tested and its fine, and the motor mounts are still good. the only thing i can think of is maybe bad injectors but if anyone has a good ideal please let me know its driving me crazy not being able to fix it and its been running like this for 4 months now iv just parked the car since i couldnt figure out the problem.