3000 rpm idle
04-21-2012, 08:51 PM
#1
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Year: 1989
Model: Cherokee
Engine: straight 6- 4.0
3000 rpm idle
My 1990 Cherokee idles at 3000 rpm. When I start it it is at 1100 and slowly works it's way up. I've slapped the gas and that did not help. What is causing this problem? Thanks.
04-21-2012, 09:35 PM
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Year: 99
Model: Cherokee
Engine: 4.0
Originally Posted by tylers89
My 1990 Cherokee idles at 3000 rpm. When I start it it is at 1100 and slowly works it's way up. I've slapped the gas and that did not help. What is causing this problem? Thanks.
04-21-2012, 09:54 PM
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Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Most likely your throttle position sensor. Try adjusting it cruiser54 has detailed instructions. Pm him and I'm sure he will gladly send them to you
04-21-2012, 10:18 PM
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Year: 1989
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I just got done putting on a new throttle position sensor. That didn't do it. When it's in drive or reverse it idles at 1100 but in neutral or park it kicks up.
04-21-2012, 10:38 PM
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Year: 1989
Model: Cherokee
Engine: straight 6- 4.0
Originally Posted by JeepHeepYoda
Mines the exact opposite. in park and nuetral its at 2500 but in drive or reverse it goes down to 1100.
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04-21-2012, 10:39 PM
#8
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Year: 1998
Model: Cherokee
Engine: Inline 6
wow, hah totally read that wrong hahah. It started happening when I put in my bored tb and reattached the sensors.. So I know it has to be those.. you said you just put in a new TPS? must be the IAC then...
04-21-2012, 11:30 PM
#10
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Year: 1998
Model: Cherokee
Engine: 4.0L
I had the same issue when I cleaned mine. Turns out I put it in the wrong way! I did not even know that was possible but when I flipped it over and plugged it back up... 750 rpm idle.
04-21-2012, 11:44 PM
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Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Originally Posted by tylers89
I just got done putting on a new throttle position sensor. That didn't do it. When it's in drive or reverse it idles at 1100 but in neutral or park it kicks up.
04-21-2012, 11:56 PM
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Year: 1989
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Engine: straight 6- 4.0
Originally Posted by Slick761
And you adjusted it to 83% of the input voltage on the trans side?
04-21-2012, 11:56 PM
#14
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Year: 1989
Model: Wagoneer
Engine: 4.0 Renix
Make sure your throttle position sensor lever thingy is underneath the metal thing from the throttle rod connecty thingy lol. I almost had the same problem but could not get over 3,000 RPM's