High idle - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 9 (permalink) Old 11-06-2007, 07:44 PM Thread Starter
 
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High idle

What rpms should a 2001 idle at? (cold and when warmed up)
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post #2 of 9 (permalink) Old 11-06-2007, 07:56 PM
 
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they should be the same, somewhere around 700-800rpm
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post #3 of 9 (permalink) Old 11-06-2007, 08:13 PM Thread Starter
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I bought the truck yesterday and drove it home (6hrs). When I got off the highway it was idling at about 1100-rpms, got it home and shut it down and restarted it and then it dropped to about 800-900. Any thoughts?
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post #4 of 9 (permalink) Old 11-06-2007, 08:25 PM
 
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could be a pump problem or an apps problem, they shouldn't idle at 1100 rpm on their own naturally.
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post #5 of 9 (permalink) Old 11-06-2007, 08:57 PM Thread Starter
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Im fairly new with diesels, can you tell me how I can troubleshoot this problem.
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post #6 of 9 (permalink) Old 11-06-2007, 09:11 PM
 
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Start with reseting your APPS sensor. That's free. I think it goes something to the effect of disconnecting your batteries. Then let it set for a night then in the morning connect them. Turn your key forward in the run position but don't start. Then slowly depress your accelerater pedal and slowly bring it back up. Something to that effect, but don't quote me on that.
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post #7 of 9 (permalink) Old 11-06-2007, 11:59 PM
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post #8 of 9 (permalink) Old 11-08-2007, 01:57 AM
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Quote:
Originally Posted by Phily 911
Start with reseting your APPS sensor. That's free. I think it goes something to the effect of disconnecting your batteries. Then let it set for a night then in the morning connect them. Turn your key forward in the run position but don't start. Then slowly depress your accelerater pedal and slowly bring it back up. Something to that effect, but don't quote me on that.
He's correct!

Everytime you disconnect you battery you MUST recalibrate your APPS sensor. This tells the ECM where idle is and where WOT is. So if you just hook up your batteries and never do it this is what you'll get... (High idle, no exhaust brake, and a few other gliches).

Just rest the APPS and your good to go! :Thumbup:

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #9 of 9 (permalink) Old 11-10-2007, 01:36 AM Thread Starter
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It has been idling fine (havent done anything yet), but it only done it after I drove it on the highway for a long time. If it were the APPS wouldnt it idle high all the time?
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