high idle

Bobby D.

Bobby D.

Well-Known Member
Joined
Nov 8, 2005
Location
Trinity, NC
I have a 2000 tj w/ 4.0 w/ a manual trans. the motor usually idles around 700 to 1000 rpm. I don't have any dummy lights burning..

I use the AC and it has been idleing up to around 1500 rpm.(I figure it's to pull more air accross the radiator & ac coil) I feather the gas and the rpm goes back to what I know is normal.

as of latley it is idleing up to around 2500 rpm. it falls back down if I feather the gas, but it sucks when you are trying to down shift & break and the motor is pushing against you. or when the jeep keeps the same speed or speeds up when your are trying to slow your speed down by letting off the gas.

has anybody had this problem before? does any body know what might be wrong.

thanks in advance
 
Hey Bobby. Sounds like you have a TPS going bad. For shits and giggles, pull the IAC off of the throttle body and give it a good cleaning first. If that doesn't help, I'd bet a beer it's the throttle position sensor.
 
I think he is meaning the Idle Air Control Module. And this in no way is a fix to your problem but just last week my XJ would surge up to 2,300rpm with no relief. I unplugged all the sensors on my throttle body one-by-one waiting for their individual affect until I came to the IAC. After unplugging and replugging the problem went away. I didn't even clean it. Like I said, this is in no way a solution, just the fact of what happened. I'm still perplexed but the problem has not come back.
 
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