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Topic Review (Newest First)
11-03-2012 05:25 PM
Derp TPS sensor can be a pesky little thing too.

Mine just went out causing high idle and a miss in cylinder 2.

It came in stages.

1. Check engine light
2. Light with high idle
3. Cylinder 2 miss and rich mixture
11-03-2012 05:08 PM
Bamadan B-wils
yours is more than likely a cold air valve out of adjustment.
11-03-2012 03:42 PM
Bloree Our 2012 Jeep Wrangler's accelerator stuck to the floor board last week. They replaced the accelerator, but can't tell me why it happened! Sometimes the windows won't roll down too...any connection?
07-21-2012 10:36 PM
tbensor Well said Jerry. I thought as much but didn't have the experience to bsck it uo
07-21-2012 11:07 AM
B-wils-TJ Mine would idle high before I replaced the throttle position sensor.. 1500-2000 rpms all the time no matter if the engine was hot or cold.
07-21-2012 11:01 AM
Jerry Bransford
Quote:
Originally Posted by mountainmandrake View Post
I did when i added a throttle body spacer recently.
There might now be a leak between the throttle body and intake manifold now which can be the cause of your high idle. Personally, I'd remove the TB spacer to see if that's the cause of the high idle via a vacuum leak installing it might have caused. Whenever there is a leak in the throttle body or intake manifold area, high RPMs are the result.

And actually, you got taken on the benefits of the throttle body spacer. There are no benefits to a throttle body spacer where a Wrangler TJ engine is concerned. No kidding. Spacers can perform wonders when placed under carburetors or the old no-longer-used type of throttle body called TBI (throttle body injection), both of which pass an air/fuel mixture, but spacers do literally nothing when placed under the air-only type of throttle body the Wrangler TJ engines use.

TB spacers do absolutely nothing for a Wrangler TJ engine. Really. No more power, no more MPG... despite the hype of some advertisements. Sorry.

And no guarantee your high idle is caused by having installed a throttle body spacer but a vacuum leak is a common cause of high idle rpms.
07-21-2012 10:48 AM
mountainmandrake I have a small amount of play on the tb cable. it is not supper tight. It has a little give when i apply finger to cable.
07-20-2012 06:45 PM
tbensor slack wouldn't cause high idle. Tension would. Did the TB spacer add to much tension? When it high idles have to looked at the throttle position under the hood? If so can you manually move it to the correct position?
07-20-2012 06:19 PM
mountainmandrake I did when i added a throttle body spacer recently.
07-18-2012 09:24 PM
Derp
Quote:
Originally Posted by mountainmandrake
My accelerator is sticking at 1500 rpm. It is almost like a big rig's high idle. I thought it might be the throtle cable sticking, but i have had the hood up and it looks good. There was no slack or pinched line. honestly it rarely happens. What could it be?
IAC . Have you ever cleaned the Throttle body?
07-18-2012 08:27 PM
mountainmandrake
My accelerator is sticking, anybody know why?

My accelerator is sticking at 1500 rpm. It is almost like a big rig's high idle. I thought it might be the throtle cable sticking, but i have had the hood up and it looks good. There was no slack or pinched line. honestly it rarely happens. What could it be?

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