It will only get worse and get hard to start and eventually quit running.
If the RPM sensor goes bad it sends no signal and the ECM (electronic control module) thinks the engine is not running and shuts everything down such as spark and the fuel pump.
This works this way so if the truck is in an accident and the engine stops but the key is still in the run position and the RPM sensor is not sending a signal the ECM any more since the egine is stopped the ECM will shut down the fuel pump to keep it from pumping gas all over the pavement to prevent a fire.
I've replaced a many of RPM sensors on Ford and Chevy Diesels. The dodge sensors are a little bit more complicated to replace though.
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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