4.0 low idle
#1
Senior Member
Thread Starter
Join Date: Jun 2011
Location: Kendall Park NJ
Posts: 682
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
4.0 low idle
My 4.0 97 idles low. Around 530-600. I replaced the iac it helped for like 15min any thoughts on were to look next?.
#5
Member
Join Date: Feb 2012
Location: Union County, NJ
Posts: 229
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2002
Model: Grand Cherokee
Engine: 4.0L
Actually the crud buildup is in the channel where the IAC plunger travels. It will build up to a point that the IAC cannot adjust the idle properly. Eventually you'll get a P1294 (idle target not met) fault along with the very low idle. I wound up pulling the throttle body, and cleaning out the channel with a small wire brush attached to a dremel. I also took the time to give the TB a good cleaning (inside, and out) while I was at it since all sorts of crud built up on the edges of butterfly. You may want to also grab a TB gasket while you have the TB off. You're actually not far from me. I'm on the other side of the Raritan in Rahway. [waves]
#7
Member
Join Date: Feb 2012
Location: Union County, NJ
Posts: 229
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2002
Model: Grand Cherokee
Engine: 4.0L
Trending Topics
#8
Senior Member
Thread Starter
Join Date: Jun 2011
Location: Kendall Park NJ
Posts: 682
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Originally Posted by KF2M
Yup, just up either Route 1 or to the end of Rt 27. I have a blue 02 WJ with a crazy looking antenna on the back.
Do you have a lift?. I have a black wj as well lifted 2.5in and 32s.
#9
Member
Join Date: Feb 2012
Location: Union County, NJ
Posts: 229
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2002
Model: Grand Cherokee
Engine: 4.0L
Yeah I do get around. I can usually be found booming up and down the major highways of NJ for work. No lift though. Pretty much going to keep the Jeep stock this time around. Since it is my DD I can't afford spend alot of time and money messing with it. If I lifted it then I can't park in most parking garages in NYC as well since the Jeep is already too close to the ceilings in these garages.
Anyways how are you making out with the TB? The weather is going to be fairly nice today (the XYL has me doing yard work today). So I am stuck hanging around the house. If you do pull the TB I would suggest you get a new gasket for it.
Anyways how are you making out with the TB? The weather is going to be fairly nice today (the XYL has me doing yard work today). So I am stuck hanging around the house. If you do pull the TB I would suggest you get a new gasket for it.
#13
Newbie
Join Date: Mar 2012
Location: Maryland
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Just a word of warning to people that think you can use carburetor cleaner in your throttle body. Don't use throttle body (tb) cleaner like it says in a previous post.
I used carburetor cleaner before in a throttle body and it never would stay clean after that.
Does the rain or fog effect the idle either better or worse? Might be an egr valve? Just a guess
I used carburetor cleaner before in a throttle body and it never would stay clean after that.
Does the rain or fog effect the idle either better or worse? Might be an egr valve? Just a guess
Thread
Thread Starter
Forum
Replies
Last Post
jurazov
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
12
07-20-2023 04:13 AM
Jamesmon4
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
1
08-16-2016 09:04 PM
Tcq192
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
10-23-2015 09:25 AM
WomanNeedsJeepExpertise
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
21
09-10-2015 06:01 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)