2003 Ford Taurus Q&A
2003 Ford Taurus Question: The engine will not rev to more than 4000 rpm and at that rpm it shudders.
I first noticed that when using passing gear it would jump in and out of passing gear. I then noticed that in park or neutral I could not get the engine to rev to more than 4000 rpm. I have changed the spark plugs and the fuel filter to no effect. I have no idea where to go from here. I have been told that the rev limiter might be bad, but I can't find any info on that, and I am more inclined to think it might be the PCM? I had the codes checked and it is not showing any. The check engine light is not on. Any help would be greatly appreciated. - jlslife
have a mech drive car with a scanner attached so he can read live data and diag problem.also have him scan poss trans codes - globalhelper