My 2003 Wrangler Idles From 1000 RPM to 2000 RPM whats wrong? - JeepForum.com

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post #1 of 23 Old 05-31-2012, 07:24 AM Thread Starter
erics1019
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My 2003 Wrangler Idles From 1000 RPM to 2000 RPM whats wrong?

hey jeep just recently started idling high. it does it about 80 percent of the time. when i turn it on it idles around 1000 rpm to 2000 rpm when i put it in first and let go the clutch it seems to go do down and it drives fine while driving but when i idle in neutral or have the clutch pressed it idles high anyone have any ideas what could be going on. i have replaced the TPS sensor and all 4 O2 sensors as well already! and there is no check engine light on what else can it be help please thanks!

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post #2 of 23 Old 05-31-2012, 07:43 AM
wytewolf00
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Go to Advance Auto Parts and use their scanner anyway. Just because the CEL isn't on, doesn't mean that a monitor is throwing a code somewhere.

You might want to take apart the TB and give it (and everything attached to it) a good cleaning.

Also, please fill out your profile...hard to see what we're dealing with here...

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post #3 of 23 Old 05-31-2012, 07:52 AM Thread Starter
erics1019
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i was thinking of doing that but i was scared when i was reading the write up and it says the gasket for the AIC do i need the gasket or can i re-use everything i take off will i need anything new?
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post #4 of 23 Old 05-31-2012, 08:04 AM
LittleBluE
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Quote:
Originally Posted by erics1019
i was thinking of doing that but i was scared when i was reading the write up and it says the gasket for the AIC do i need the gasket or can i re-use everything i take off will i need anything new?
Clean the IAC valve. That can make it idle rough. Hell clean out your throttle body and you'll probably fix the problem
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post #5 of 23 Old 05-31-2012, 08:07 AM Thread Starter
erics1019
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i want to do that but i was reading a step by step guide and it said to use a new gasket or gasket sealer will i need that or can i just take the TB a part clean it and put all the original stuff back on?
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post #6 of 23 Old 05-31-2012, 08:11 AM
gotmudd1
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I had the same problem awhile back. Cleaned TB and senors and no problems since. You can reuse the gasket if it comes off in one piece and in good shape. No need to use sealer on the TB. Good luck!

97 Wrangler: 4.0L, 5 speed, BB, 31's KM2's, CAI, Cat-Back Exhaust
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post #7 of 23 Old 05-31-2012, 08:19 AM
wytewolf00
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I ripped the IAC mount gasket when I tore my TB apart, but used Permatex Copper to seal it up on the re-install. Been fine since. I also keep a sheet of adhesive-backed gasket material in the garage, in case I need to make one...

Just be careful and don't over-torque the bolts. Clean and scrape every surface, spray it thoroughly with TB cleaner and be sure to get into the small spots. I used Q-tips and an old tooth brush for most of it, and a razor blade to scrape oxidation off of the surfaces.

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post #8 of 23 Old 05-31-2012, 08:20 AM Thread Starter
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thanks i am going to give it a shot this weekend thanks!
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post #9 of 23 Old 05-31-2012, 08:21 AM
Jerry Bransford
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A high idle like that is more often caused by a vacuum leak. Cleaning the IAC won't hurt but has any work been done on the engine recently, like on the intake manifold or exhaust header? Work like that can easily cause a vacuum leak which invariably causes high idle RPMs.

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post #10 of 23 Old 05-31-2012, 08:23 AM Thread Starter
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no nothing has been down for almost a year to the engine. if i bring it to a shop can they find the leak if i have one and how much would they normally charge i don't think i would be able to find a leak and fix it?
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post #11 of 23 Old 05-31-2012, 10:07 AM
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Quote:
Originally Posted by Jerry Bransford
A high idle like that is more often caused by a vacuum leak. Cleaning the IAC won't hurt but has any work been done on the engine recently, like on the intake manifold or exhaust header? Work like that can easily cause a vacuum leak which invariably causes high idle RPMs.
Jerry that totally slipped my mind.

Vaccum leaks can very easily cause your problem.

LISTEN to jerry. He's the man.
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post #12 of 23 Old 05-31-2012, 10:09 AM Thread Starter
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is a vacuum leak something i am going to have to bring it in to a shop to have them find and fix and is it expensive?
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post #13 of 23 Old 05-31-2012, 10:29 AM
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is a vacuum leak something i am going to have to bring it in to a shop to have them find and fix and is it expensive?
No. It could be as easy as sticking a hose on a corresponding spot on the intake manifold.

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Anybody can take advice if it doesn't interfere with their plan.

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post #14 of 23 Old 05-31-2012, 10:34 AM Thread Starter
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i am confused what you mean sticking hose? what hose and how will i know which hose? sorry i am some what mechanical and stuff but i actually have never done this before!
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post #15 of 23 Old 05-31-2012, 10:40 AM
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It simple, open up your hood and start poking around the intake manifold and you will find hoses going into intake manifold. Make sure those hoses are all attached and not dry rotted or leaking...

Rokmen TT, Rokmen control arms, Novak NV241 cable shifter, JKS 1.25" BL + 1" MML.

Anybody can take advice if it doesn't interfere with their plan.

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