High eratic idle - JeepForum.com

 
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post #1 of 4 Old 07-27-2013, 03:22 AM Thread Starter
03Ruth
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2003 TJ Wrangler 
 
Join Date: Nov 2011
Posts: 81
High eratic idle

So I have been trying to find the source of my high idle with no luck. After I start it up the rpm's will run around 1500 for about a minute and then drop down to normal range. Once I start driving I will get the rpm's up to around 2500 and once I push in the clutch to shift the rpm's will stay there unless I leave the clutch in for a bit they will come down. It's really annoying and just seems to be getting worse. The weird thing is there is no check engine light and no codes but there is definitely a problem. Around 5-6 months ago I took off the throttle body, disassembled it and cleaned it shiny new. I have cleaned the IAC and replaced the map sensor about a year ago. The throttle assembly isn't sticking and I have checked for vacuum leaks using the propane method and brake cleaner with no luck. Any ideas on what else to do?

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post #2 of 4 Old 07-27-2013, 07:32 AM
tomsrancho
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1999 TJ Wrangler 
 
Join Date: Jun 2009
Location: Farmington
Posts: 223
Throttle position sensor or O2 sensor might be the problem. There are a lot of threads on these that cause problems similar to yours.
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post #3 of 4 Old 07-27-2013, 11:42 AM
Jonny Jeep
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1997 TJ Wrangler 
 
Join Date: Feb 2007
Location: Manchester
Posts: 5,422
I too would say the TPS.

Online factory service manuals and parts lists - http://www.jeep4x4center.com/knowledge-base/index.htm
If it doesn't work properly, look for the service manual link at the bottom of the page.
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post #4 of 4 Old 07-27-2013, 12:45 PM
Greenfun2
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2004 TJ Wrangler 
 
Join Date: Sep 2010
Location: Watseka
Posts: 422
Don't get a TPS from Autozone. Im on my third one and it's not right.
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