Just came in from a 2 hour trip and noticed that my idle was stuck at 1100 rpm. The idle remained high as I stopped at various intersections. Got home and turned off the engine, waited 30 seconds, re-started, and the idle dropped down to 800 rps (where it usually is). No error codes and it has never done this before. Truck is a 2002 with 40,000 miles on it. What is up??

 

Mine was doing that last week, then this week it threw a low apps voltage code when it was stumbling with light pedal at about 1400 ish rpm, Could be a early sign the apps is on the weay out, or at least that is where I am going with it.

 

MY '01.5 always idles at 850 or so. It is my understanding that's what is programmed into the ECM. Have you tried the APPS reset procedure?

 

I am not what the APPS is........

 

This high idle was experienced just after I drove through a driving snow/rain storm. I have driven the truck for over an hour today and so far no problems. Could this high idle just have been a fluke or perhaps weather related????

 

Very well could have been moisture related, APPS contacts might have gotten wet.

APPS=Accellerator Pedal Position Sensor, fly-by-wire system in our trucks.

Once it's wet, it could easily get corroded, so you might want to check the connections, and perhaps waterproof them.


phox

 

I dont know if all the 5 speed trucks are the same but, if I slow down for a stop light or something my truck will idle at about 1100 rpm until I get below 5 mph or so and then it will drop down to 850. If yours is the same way, I would say it is either the apps or a speed sensor that is corroded or has a loose connection. Just my .02