If you either get no rpm or its erratic, then change the Instrument cluster as one unit. RPM cannot be fixed or changed. You either have to buy a used unit from a junk yard or buy the cluster new at the dealer. Its expansive, I would buy a used one from a salvage yard for around $75-150. Good luck. I have 15+ years as an automotive technican. Trust me.
The RPM gauge is connected to the same wiring on as all the lights on the dashboard. A faulty RPM gauge can be replaced but requires removing the whole dash from the vehicle.
your rpm gauge works off your engin your speed gauge works off the transmission where the cable slides into the transmission tha plastic geer is probably stripped
Chack the fuse. If it's not the fuse, it's a sensor.
replace the printed circuit board behind the tach gauge. $15.00
why doesn't my rpm gauge and temp gauge, fuel gauge not work
First off, the correct terminology is tachometer, not RPM gage. And second, we do not have enough information on your problem to give you a proper diagnosis, thus we can not tell you how to fix it. My suggestion would be to see a mechanic.
while driving the rpm gauge work perfect, when start accelerating the rpm can not exceed 3 with interruption in the engine
Your engine is not running or your "RPM gauge" is broken.
How much it did odometer infiniti i30 2000
rpm
The 2012 Infiniti FX's engine produces 303 hp @ 6800 rpm.
The 2011 Infiniti EX's engine produces 297 hp @ 6800 rpm.