RANDOMLY CUTS OFF RESTART WITHIN 2 SECONDS TO 20 MINUTES

2000 Dodge Ram

Tiny

Paul Eppley

December, 16, 2011 AT 2:25 AM

2000 Ram 1500 truck: Randomly cuts off. It will restart within 2 seconds to 20 minutes. When it shuts off, I get a "No Bus" fault on the odometer. The instrument cluster is non responsive, but truck still has electrical power to lights, radio, heater, etc. However, when I try to crank it, the starter turns over, but no fire or attempt to run and I don't hear fuel pump. Then it will crank. This time out is from 2 seconds to 20 minutes. Help! Any ideas. Thanks

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Tiny

rasmataz

December, 16, 2011 AT 2:32 AM

Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

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