High Idle diagnosis?

[xComancheKidx]

hey all I'm having some issues with my idle and was wondering where i should start to diagnose the problem.. its a 4.0 and when i start her up the idle is unusaully high and will continue to idle high while running..any help?

[Pete M]

could be a vacuum leak.

[Automan2164]

:agree:

 

Start there. Listen for unusual hissing... You can also use propane or other system safe aerosols to spray around problem areas. If the idle goes up after you spray, thats where your problem area is...

 

Rob L.

[rworks]

TPS? Mine gets stuck or something every now and then and doesn't kick down right, resulting in a high idle.

[88mjmanche]

on your air intake there is two sensor like things they have wires going to them the one on the left side is probly the problem mine got stuck and would idle high. take the intake hose of the engine side ( three torx bolts ) and put your finger over the small hole see if that slows the idle. :D

[smithe1811]

I had that same problem and my fix was(bare with me here because i don't know the name of the part) on the drivers side just between the manifold and the wheel well there is a small whiteish valve with 3 hoses leading to it, one on the left and the right and one on the bottom, on mine the bottom one was melted shut and when i fixed that, it fixed my idle. hope this helps.

 

Erik

[xComancheKidx]

yea i just replaced my exhaust manifold so i think maybe i forgot to hook a hose back up or tweaked something..I'm going to look everything over