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Old 10-11-2011, 05:47 PM
ahhmann77 ahhmann77 is offline
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Default 2002 magnum 5.9 rough idle/ stallout when cold.

I have 2002 Ram 1500 4x4 with the 5.9 litre gas engine. I just got it a month ago. It is having a bad idle after it runs for 20 to 30 seconds at idle. Then the idle will want to drop dow to under 500 rpm and it acts like it is chugging or will choke itself too much gas. Smells like it is rich. It will almost run like this for a couple of minutes and then it iwll pick itself up to normal idle and smooth out. It will do this on almost everytime it is ran and restarted. Even after a little 5 minute cool down. I know these are known for intake leaks, but it sure seems like it would be something else. It has no check engine light on. It has stalled out a couple of times. I took it back to the Dodge dealer and they say it is due to the aftermarket exhaust, which I know is BS. CAN anyone give me a clear direction on what to change out. I am a Nissan Technician for Twleve years, so I have no problem doing the work. Anyone please help.
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Old 10-11-2011, 08:20 PM
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frealz13 frealz13 is offline
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maybe the throttle position sensor when they go up it idles like crap. there like 20 bucks . might be worth a shot. good luck
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Old 10-11-2011, 09:42 PM
Gen1dak Gen1dak is offline
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It seems like it should be something else? OK, and it could be, BUT you must eliminate the manifold first. The vacuum leak throws the electronics into a tizzy. Sucks oil, which can cause rattling and misfire. The leak causes a run lean condition, which the computer tries to correct for. Misfire and fatter fuel delivery..... Anyone smell gas? Could be the TPS as mentioned, or any one of several other sensors. It's what I hate about these computerized models.
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