2001 5-speed idling fast after driving on highway

[x111981]

I have a 2001 Dodge Cummins 3/4 ton 4x4 5-speed manual with 95,000 miles and no modifications. After getting off the highway(about a 15 or 20 minute drive) it idles a little faster than normal probably around 1000 rpm, but it seems to be getting faster and faster. It has been going on for about a week, I have only had the truck for 2 weeks, but I dont remember this happening the first week. Today after getting off the highway it was idling a little over 1000 rpm. I stopped at the Post Office only for about a minute or two, I shut the truck off, and when I came out and started it, it went back to a hair below 800 rpm which I assume is normal. It doesn't seem to do anything strange on a cold start, or even a cold start when the glow-plugs come on. When running normally, when I come to a stop light it does run a hair faster until I have been stopped for a few seconds, but then kicks back down to 800 rpm, but I am assuming that is normal. When it is running fast it does not do that. Just wondering if anybody has ever heard of this, and if it is something simple like a throttle cable or something, or something more serious I should have looked at before it gets any worse. Any help would be greatly appreciated. Thanks!!

[wadecool]

Your apps may need to be reset, so try that. If that doesn't work, try adjusting the tps sensor.

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01 2500 LWB 4x4 5spd K/N, 4 1/2in straight pipe, Superchips, Maxxis Buckshot Mudders

[nuclear]

I have also experienced this problem on my '01 Cummins H.O. 6-speed. The truck is all stock, with only 90K easy miles on her. Sometimes after long highway cruises, the idle stays at 1000ish- 'till I shut it off. Upon next start, everything returns to normal. One time is actually gave me a "Check Engine" light, but cleared out after a few miles. I had the local Dodge dealer scan codes, and he said that the "APPS" had shown up on faults. That's the Accelerator Pedal Position Sensor. I figured I'd just replace it, until I learned that it was about $600. I wound up doing nothing at all, and the truck has not acted-up since.
Since I'm sure that something goofy is going on, I will be interested in seeing where this thread goes....

[nuclear]

Bump........

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2001 Dodge Ram 2500 4WD. H.O. Cummins, 6-speed manual. Completely bone stock.

[wadecool]

Here's the procedure for resetting the apps:
This procedure has shown to help 24 valve ISB engines. It is basically teaching the fly by wire accelerator on these trucks to reread the position of the pedal and it's limits. Most complaints this will help with is poor acceleration, improper shifting, bucking in 5 and 6 speeds. Has been known to increase fuel mileage in some instances. 1. Set parking brake 2. Disconnect negative battery cables on both batteries 3. Turn ignition key to run(to drain any remaining capacitors) 4. Let truck sit for 30 minutes( this is the recommended minimum) 5. Return ignition to OFF position 6. Reconnect both batteries and secure, not a timed event 7. Turn key to run position(not start) and depress accelerator pedal slowly all the way to the floor 8. Allow pedal to return to top position slowly 9. Turn ignition switch OFF 10.Release parking brake.

Hope it helps.

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01 2500 LWB 4x4 5spd K/N, 4 1/2in straight pipe, Superchips, Maxxis Buckshot Mudders

[CumminStrokeThis2001]

I had the same thing happen to my 01...but it had to be changed out...it was wore right out...or so my mechanic said lol...I asked him if i could just reset it and leave it and he said ya but if and when it goes for good it will go to an idle in an instant and if yourr doin 60 mphwell i wouldnt wanna see that lol...although ive never heard of that happening to anyone..still wouldnt wanna take the chance...so i replaced it

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Its not pollution, Its HORSEPOWER
2001>> Stage 2 cold air, 6" stacks, smarty stacked w/ juice, BD injection pump, FASS and a whole lot of black smoke