I have some more information that might be of some more assistance.
I noticed that the engine will have a severe misfire (strong enough to flash the MIL and set the P0300 code), but only in 2nd gear. If I'm going 35 miles an hour in 2nd gear (about 2500RPM) and I try to coast or maintain a certain RPM above 2000 and lightly have the accelerator pressed, the misfires happen. When I accelerate in 2nd, nothing. This problem doesn't happen in Over Drive. When I stop in 2nd, nothing.
The engine was also at operating temperature, but it will also do it when it's cold.
The first time I tried to recreate the conditions and set the P0300 code, it also set P0147 and P1351 along with it. The second which I let it misfire only for a short period of time, set only the P0300.
Friday, October 17th, 2008 AT 10:24 PM