I have a 1994 Ford Mustang 3.6L. It will drive perfectly fine sometimes and then other times it will die in the middle of the street. It dies even at highway speeds. The last time I drove it I was on the highway going about 60MPH and it died. I tried popping the clutch and it started to sputter as if it were starting to get power again and then it died. When it starts to die it stutters/bucks as if someone were driving that doesn't know how to drive a manual. After that it wouldn't even crank back up. Sometimes it will crank back up and run fine, but at other times it just dies. I have replaced all of the following: fuel pump with entire assembly & filter, EGR valve, TPS, Crankshaft position sensor, ignition wires, coil pack, fuel pressure regulator, mass air flow sensor, differential feedback pressure regulator, PCV valve, battery & terminals/wires, spark plugs, air filter, radiator flush and fill, idle air control valve appears to be new(i just bought this car last year).
After we replace each thing it will crank and run for a few minutes and then it quits again. Then we pull up the code P0320 on the OBDII. I don't understand what this code is saying. Can someone explain it in lamens-terms or tell me what may be going on with my car? thanks