High Rpm at start up and in park.
12-31-2016, 07:12 PM
#1
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Location: LONG BEACH, CA.
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Year: 1998
Model: Cherokee
Engine: 4.0
High Rpm at start up and in park.
Im getting 2000-1500 Run's at start up and about 1500-1200 in park. It goes down eventually and idles at about 800-900 in gear. I have replaced the Tps twice (one was a mopar and died in 6 months),spark plugs,wires,had a crack in the manifold welded,dist cap,roter, Iac, and cleaned throttle body.Any ideas what this could be???
Last edited by brancis1; 12-31-2016 at 07:20 PM.
12-31-2016, 08:29 PM
#2
THis happend to me today. Take the IAC (idle air control) out and clean it. I had to screw mine out a couple of times to get the engine to calm down.
Im getting 2000-1500 Run's at start up and about 1500-1200 in park. It goes down eventually and idles at about 800-900 in gear. I have replaced the Tps twice (one was a mopar and died in 6 months),spark plugs,wires,had a crack in the manifold welded,dist cap,roter, Iac, and cleaned throttle body.Any ideas what this could be???
12-31-2016, 09:10 PM
#3
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Year: 1998
Model: Cherokee
Engine: 4.0
12-31-2016, 11:21 PM
#5
I'm just telling you my experience: Once you take IAC out there is a nipple or piston that can be screwed in and out(carefully) I've heard some say not to twist it...I am not sure if it's ok to twist or not. But I cleaned mine and I guess twisted it. Today out of no where the jeep's rpm's jumped up to 2200 at idle when I started the car. SO, i took out the IAC and unscrewed the piston until it was flush with it's housing. Once I put it back in, everything was ok.
12-31-2016, 11:40 PM
#6
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Year: 1998
Model: Cherokee
Engine: 4.0
I'm just telling you my experience: Once you take IAC out there is a nipple or piston that can be screwed in and out(carefully) I've heard some say not to twist it...I am not sure if it's ok to twist or not. But I cleaned mine and I guess twisted it. Today out of no where the jeep's rpm's jumped up to 2200 at idle when I started the car. SO, i took out the IAC and unscrewed the piston until it was flush with it's housing. Once I put it back in, everything was ok.
