Hi Vin,

Have you made any progress on this? Hopefully one of the resident experts will chime in with an opinion for you. I looked at my alldata info since our cars are similar and confirmed that all the 300 codes you getting are misfire as you said. Does anyone know how to determine if an AMM has been replaced? Is there a date code on it anywhere, since Vin doesn't know if his is original. There is a theory that problems are related to car color, what color is your car?? (this theory is a joke of course) Having said that, Blue and Black cars seem to have bad AMM's...

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra