My 2002 TC 3.3Lengines functions smoothly while in neutral, but when I engage the transmission and while standing runs very rough. When running at normal speed it runs smoothly.

 

any codes in the computer?

 

code is 0305.-I have replaced: the crankshaft sensor, spark plug, injector, fuel pump, throttle control sensor, map sensor. Could it be that the ECU needs flashing?

 

the 305 is a number 5 misfire a crank,TPS,map sensor has nothing to do with that code nore does a fuel pump u replace the plugs but not the wires? what about the coil pack?
Did u look up what the code means b4 u spent all the money and time on the above things?

 

Are you getting consistent spark and fuel injector pulse, when in gear? If yes then check compression.

http://www.obd-codes.com/p0305

 

I just did a valve job