The year, make and model info would help. If it's cable driven the cable might need lubrication.
Your engine is not running or your "RPM gauge" is broken.
ignition module , computer , wiring or fuel system problem. when engine stops rpm gauge goesto zero.
why doesn't my rpm gauge and temp gauge, fuel gauge not work
1. fuel gauge or gas gauge 2. RPM gauge or tachometer 3. Speedometer or Speed Gauge 4. Oil gauge 5. Odometer 6. Electrical gauge 7. Temperature gauge
yeah the problem is that your RPM gauge doesn't work. This can be causes by a blown sensor either on your motor, or in the relay to your gauge cluster. Take your car to a dealership to be sure. For about $50, they will read the compute error code your car is producing and quote you on the repair and tell you how deep the problem is. I you don't trust them, many other mechanics have code scanners.
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.
while driving the rpm gauge work perfect, when start accelerating the rpm can not exceed 3 with interruption in the engine
depends on what car and what engine, typically if your cruising on a freeway, you will be running at half RPM or at the most 3/4, but the lower RPM the better with that you get better gas mileage.
your water pump
rpm
Get to a shop quick.
When the RPM (revolutions per minute) gauge doesn't move, it typically indicates that the engine is not running or the tachometer is malfunctioning. In vehicles, this could mean the engine is off, there's an issue with the ignition or fuel system, or a problem with the vehicle's electrical system. If the engine is running but the RPM gauge is still static, it may point to a faulty sensor or wiring issue. It's advisable to have the vehicle checked by a mechanic to diagnose the exact cause.