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Throttle Issues


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I am new to the Diesel world i have a 99 2500 4x4. The problem that i am having is when i start it up and barely press on the throtle or press the throttle to the floor it will only go to 1500 RPM. I can take off the negative battery cables for about 30 min and reset everthing and it may a run couple of months and then it will happen again. Can any one give me some insight on what to do to fix this problem?

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The the battery disconnect is doing is killing the APPS calibration. How to calibrate the APPS sensor. http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/26-engine-systems/258-how-to-reset-calibrate-apps-sensor Showing that disconnecting the batteries doesn't erase anything.

http-~~-//www.youtube.com/watch?v=fn7J8FQ8x5w

As for why it changes is most likely a battery cable issue or internal ECM issue. So my question is any error codes present when this problem occurs.
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