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Old 04-12-2014, 07:09 PM
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RogerRamJet RogerRamJet is offline
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Join Date: May 2013
Location: Mansfield, TX
Age: 49
Posts: 10,320
Gender: Male
Vehicle: 2005 Ram 1500
Trim Level: Lonestar QC
Color: White
Engine: 2002-2007 287ci (4.7L) PowerTech V8 235hp 295lb/ft
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My first thought would be the coil. But you said one time it was running but showing no RPM's and would rev but wouldn't accelerate. It could be a lose ground like Warlock said, but usually if something is jarred lose, it has to be jarred or bounced back. Like Gen1, I am thinking a sensor as well, but more like the throttle position sensor because of the reving without accelerating issue. It sounds like something is heating up and failing, then when it cools down, works again. I would try the tap test on the ECM. When it's running, tap on the ECM with a large screwdriver handle. If it dies, you know you have a bad ECM.
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