4.0 Wont idle

xptb
Full Member

Posts: 277

4.0 Wont idle May 5, 2013 12:57:25 GMT -6 via mobile

Quote

Post by xptb on May 5, 2013 12:57:25 GMT -6

This happened with my old engine and just happened with my new engine. It will stay on if I hold the gas and runs smooth. Once warmed it will idle on its on but driving it causes it to die when I let off the gas.

I'm thinking IAC

Now for the confusion. The battery, which is new, seems weak. I have an evap leak code that has been on for ages. When I got it to idle on its on, I noticed the CEL was off. The code is gone. Also, it was blowing white smoke for about 2 minutes then stopped.

I read somewhere that if the battery had a bad cell, it won't let the alternator charge right and die. I'm taking the battery to have it tested and cleaning the IAC. The smoke did worry me though

-Keith

Somebody Administrator Posts: 6,865 Location: Beautiful Arizona!	4.0 Wont idle May 5, 2013 13:01:59 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Somebody on May 5, 2013 13:01:59 GMT -6 I think you already may have figured it out.. Change batt.. then clean your IAC.. Mine did the same thing when I would stop at a stop sign..
	Sometimes it's better to get Back To Basics.... Loyal Member since Jan 4th 2013

mike
Founder

Posts: 5,790

Location: Nesbit

4.0 Wont idle May 5, 2013 13:41:32 GMT -6

Quote

Post by mike on May 5, 2013 13:41:32 GMT -6

the smoke sounds to me like it was loading up on too much fuel trying to compensate for something wrong elsewhere, I really don't know enough about all the electric crap on these vehicles now days to even make an educated guess as to why tho

Member since Feb,4,2013
Rig: 2009 JK
Never take instruction from a guy with missing fingers.

slinky Full Member Posts: 803	4.0 Wont idle May 5, 2013 14:49:34 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by slinky on May 5, 2013 14:49:34 GMT -6 try your CPS also they are notorious for going out and causing all kinds of problems.
	It's basically a Jeep

xptb Full Member Posts: 277	4.0 Wont idle May 5, 2013 17:22:21 GMT -6 via mobile Somebody and MJL like this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by xptb on May 5, 2013 17:22:21 GMT -6 Battery tested OK. I cleaned the IAC and it runs now. Back in business!
	-Keith

mike Founder Posts: 5,790 Location: Nesbit	4.0 Wont idle May 5, 2013 17:50:21 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mike on May 5, 2013 17:50:21 GMT -6 Glad you got it figured out
	Member since Feb,4,2013 Rig: 2009 JK Never take instruction from a guy with missing fingers.

Somebody Administrator Posts: 6,865 Location: Beautiful Arizona!	4.0 Wont idle May 5, 2013 20:23:04 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Somebody on May 5, 2013 20:23:04 GMT -6 May 5, 2013 17:22:21 GMT -6 xptb said: Battery tested OK. I cleaned the IAC and it runs now. Back in business! It's amazing how many people don't know about the IAC and how easy it is to clean!
	Sometimes it's better to get Back To Basics.... Loyal Member since Jan 4th 2013

xptb
Full Member

Posts: 277

4.0 Wont idle May 7, 2013 18:56:23 GMT -6

Quote

Post by xptb on May 7, 2013 18:56:23 GMT -6

The IAC acted up again on a trail. My buddy who knows nothing about cars got scared and though we were stuck. It was hilarious. I think I gotta soak it in carb cleaner and see if that fixes it for good. It was only goofy for a few minutes and then ran fine again.

-Keith

Somebody Administrator Posts: 6,865 Location: Beautiful Arizona!	4.0 Wont idle May 7, 2013 19:34:33 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Somebody on May 7, 2013 19:34:33 GMT -6 Might have to change it to a new one.. If it's sticking or it's not actuating cleaning it won;t help..
	Sometimes it's better to get Back To Basics.... Loyal Member since Jan 4th 2013

xptb Full Member Posts: 277	4.0 Wont idle May 10, 2013 9:17:38 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by xptb on May 10, 2013 9:17:38 GMT -6 yeah. i also found out i bent the backing plate on my rear drum brake. now it leaks. Junkyard shopping time!
	-Keith

emalaayyy: Big thanks to all you parents who have sent your kids back to school. We appreciate it

Just remember...we give them back in 10 months

Aug 15, 2015 10:21:43 GMT -6

mike: too bad you can't see this on the mobil version.... and yes i know you can switch to desltop version on the phone and see it Jul 19, 2016 20:19:58 GMT -6

scooter03inca: Hello all-most of y'all know me I think.I haven't been on here in a long time,and apparently my account disappeared,so I just created a new one. Jan 29, 2017 11:46:51 GMT -6