I HAVE A 93 J30T. AFTER IT REACHES NORMAL OPERATING TEMP IT WILL NOT RUN OVER 2000 RPMS. I DID A TUNE UP, WHICH I REPLACED THE PLUGS, AIR AND FUEL FILTERS AND FUEL PUMP AND STRAINER.STILL DID NOT HELP. THE FUEL PRESSURE IS 30 PSI. I HAVE NO CHECK ENGINE LIGHT ON AS WELL. I HAD THE CATS CUT OUT AND INSPECTED, THEY WERE FINE?

WHAT SHOULD I CHECK OUT NEXT? :

First of all, are the caps nessisary?

Secondly, 30psi for the fuel pressure is about 6psi too low. You probabaly need a new FPR.

Lastly, try getting a new engine temperature sensor. I think they're like $25.

Moved ya to the J30 forum... not sure why this was in CA18, but ok.

Sean

You may need a new transmission rev sensor.