Question about 1999 Dodge Ram 2500 4WD

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99 Dodge Ram 2500 4WD turns over, wont fire

We have a 99 Dodge Ram 2500 4wd that wont start. It ran fine up until Sunday morning when it had a completely dead battery when we went to start it. It started with a jump and ran for 10 minutes when we shut it off, then restarted it. Ran fine again so we shut it off and when we went to leave again it wouldent start. We tried to jump it again and it turns over but will not fire. We got a new deep cycle battery, installed it, and still it will not start. We checked the fuel pump and fuel lines and the pump is working and the lines are at the suggested pressure. We checked all the spark plugs and wires and they are good. We put gas treatment in to remove any moisture in the tank and lines and still nothing. We also got a code reader and tested the trucks computer 5 times and had the same result each time "Test Completed- No Codes Found" Any help would be great- we are at a complete loss for whats wrong with it!!!!!

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  • Heather Hall
    Heather Hall Dec 31, 2008

    We ended up having our mechanic friend come out with an Ohms tester and he found the problem was the Cam Shaft Positioning Sensor. It was an easy fix, costed around $60 for it and the truck fired right up! It runs better than the day we got it because he ended up doing a massive tune up trying to rule out the problem!

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I had a similar problem and believe it or not it was the CAT. An easy way to test for this is to remove the O2 sensor right in front of the CAT. Once you removed it, plug it back in while unscrewed from the exhaust pipe and start up the truck. If it runs fine, the CAT is your problem. This is just a guess and it would be an easy and very cheap($0) test. You did not say if the truck was diesel or gas. Mine is gas that was exhibiting the same problem as yours...good luck!

Posted on Dec 23, 2008

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