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Q: motor shuts off when driving on 1992 Dodge Dakota

i just bought this truck and its left me sit 3 times will just shut off when i'm driving it and after a few minutes it will start back up..i did put a new switch in it but it still shuts
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Its so hard to guess at what could cause an intermittent failure like this without being able to do some preliminary tests first hand. An engine needs three basic things to start, mechanical integrity (the engine's components must be in synchronization with each other and the engine must be able to develop compression), the engine must get fuel injected into the cylinders (fuel must be injected into the engine ( there is a computer that takes inputs from many sensors on the engine, interprets these signals and decides when and how much fuel to inject into each cylinder) finally the engine needs spark to ignite the fuel injected into the engine, (the spark is also controlled by the vehicle's computer deciding when the spark arrive at the spark plug). If the components in the engine are not in synchronization due to a broken or "slipped" timing belt or chain the engine will not develop adequate compression to start and run properly. If any engine sensor has failed (crank angle sensor, camshaft position sensor, intake manifold pressure senor/air flow meter, coolant temperature sensor) any of these will cause the engine to fail to start by causing a loss of spark or fuel delivery. All these components need electricity to function, a failed fuse, relay, open or shorted electrical circuit could cause the computer, fuel pump or ignition system not to function. Unfortunately there are too many things that could cause your engine not to start to be able to pin point anything to specifically look for. Check for fuel and spark first. On the Dodge it could be a failed or failing fuel pump have seen that before but test for spark when it fails by getting a friend to crank it over while you pull off a spark plug wire and hold it near ground to check go a good healthy spark.
My 1992 Dodge Dakota 5.2L V8 was doing the same thing. Dodge has a SB on this problem it says the original idle air control valve can cause this after the truck reaches normal temp. I changed the idle air control valve on mine and have not had any problems since.
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