Question about 2004 Dodge Durango

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Check engine light on. Will not rev up over 2500 rpm. Fluctuates between 2000 and 2500 rpm and runs rough. Upon first start, you can rev fine and it runs smooth as long as you hold the rpms over 3000. However, once it gets down to 2500 rpm it starts again. SLT 4.7L AWD

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  • Dodge Master
  • 8,557 Answers

Hi, there are a lot of things that could cause this behavior, so it would help us to diagnose your problem if you could get a scan of the OBD2 connector and send us the trouble code. If you live in the US you can usually get a free scan at your local parts chain.

Posted on May 19, 2011

  • timo-t May 24, 2011

    Had same problem. Catalytic convertors were blocked. I got under there with a rubber mallet and beat on them,was a temporary fix, but worked. Don't want to spend the $ to replace them.

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Posted on Jan 02, 2017

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Reply to Steve P. It will start and run fine every time except if I go faster than2500rpm.checked so many things and replaced many parts. What could it be? It starts right back up.


Hey Karen.. I do not recall what all has been done,...try this.... While you are sitting still, vehicle in park,see if the engine will rev over 2500 rpm?... try holding the engine at 3000 rpm.. see if it will stay at 3000 rpm.. If it does, try 3500 rpm... see if it will stay at 3500 rpm... try this and let me know what happens.... ??when it stops does it sound like its running out of gas??? remind me what vehicle/make/model. etc we are working on .. please...
Karen, use the comment section to reply.. please mark as helpful.. we can connect through comments.. ( I just happened to stumble upon this!!).. Thanks..

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`jack

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My 1987 turbo toyota supra will only rev up to 2500 rpm then cut out like a governer. when it drops to about 2000 rpm it will rev back up only to 2500 rpm. at an idle it runs rough


The throttle position sensor has an idle switch in it that tells the car's computer that the throttle is positioned at idle. If the idle switch sticks in the idle position, the computer will not allow the engine to rev more than 2500 rpm. In your case, I think the switch is stuck.

First, see if you can get the trouble codes to come up. Rig a jumper wire and jump between the "T" terminal and the "E1" terminal in the car's "Diagnostics" box. It is a small black box on the driver's side of the engine compartment near the battery. Open the lid and on the inside of the lid it has a map of the terminals.

Once you hook up the jumper wire, turn the ignition switch to on but do not start the car. If there are codes, the check engine light (orange) will blink the 2 digit code. It blinks the first digit, pauses, then blinks the second digit. The code for the throttle position sensor is code "41". That is, four blinks...pause...then one blink. If this code comes up, change the throttle position sensor. (If there are no codes, the check engine light will steadily blink once per second until you turn the key to off.) Don't forget to remove the jumper wire when you are finished.

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