Q: my engin starts to hesatate at around 30 mph and 40 mph. then stops hesatating t on 2001 Dodge Ram Van 1500

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when i get to 50 to 55 seems like it wants to stall like a very fast stop and go series of bursts new plugs ,rotor and distributor
(1) Answer
There are a few possible causes for this condition. The most likely cause would be your Throttle Position Sensor (TPS). This is a electro-mechanical part which is subject to wear everytime the throttle is moved. The part of the sensor most vulnerable is 1/4 throttle, right about cruising speed. Try this firsr as it is easily replaced and not too expensive.
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