Not idleing very well

[89pathfinder]

Alright well yesterday morning the truck ran fine. And later in the evening when i went to go shoveling i noticed that when i left the truck to idle even after it had warmed up that the tack would jump from 1 to 2 grand and then fall back down to 1. I cant figure out whats going on. Any help would be greatly appreciated.

[88pathoffroad]

Wax choke could be sticking, so could the IAB solenoid in the TB...

[89pathfinder]

I have also noticed that the temperature guage has not been moving, even after it should be warmed up. Could this possibly have anything to do with it? is there an automatic choke when the needle is on the temp guage is all the way down?

[88pathoffroad]

Actually, no. One temp switch only runs your gauge, the CHTS(cylinder head temp sensor) gives the ECU info on how hot the engine is. Your thermostat could be stuck open or the temp switch could be disconnected or something. The temp switch should be in front of the engine on top of the intake but under the air cleaner.

[89pathfinder]

Well i just recently changed the thermostat. But if it was stuck open, how would that explain the rpms jumping? I will check the temp switch.

[trogdor]

I had an 88 pathy that just all of a sudden started to Idle real rough, when I checked it out it there was a hole in an air hose check all your hose's. the one on mine was on the front of the motor.

Edited January 1, 2008 by trogdor