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 - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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