Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 05-08-2012, 04:28 PM
tkdgirl's Avatar
Member
My Jeep: 2004 4.0L WJ
 
Join Date: Feb 2011
Posts: 116
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 2232
tkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond repute
Angry Replaced IAC motor... Still stalling

Had a p0505 last week and replaced the IAC motor (and o2 sensors too). Ran great for a few days and today, started stalling at idle again. What gives?

Should note I left cabin lights on and battery died this weekend. Jumped it back...
__________________

__________________


2004 Grand Cherokee SE i6 | 2" BB with Daystars and brand spankin' new Bilstein 5100s | Summut Racing slotted & dimpled ultimate performance front rotors and power stop ceramic pads | JK Rubicon wheels w/ 245/70/R17 General Grabber AT2s

Reply With Quote
  #2  
Old 05-08-2012, 05:02 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,645
Thanks: 9
Thanked 54 Times in 52 Posts
Rep Power: 525443
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: Replaced IAC motor... Still stalling

No check engine light on or any fault code set now? Is the problem exactly the same as before changing the IAC motor? Did the problem imediately start after draining the battery?
__________________

__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #3  
Old 05-08-2012, 05:15 PM
tkdgirl's Avatar
Member
My Jeep: 2004 4.0L WJ
 
Join Date: Feb 2011
Posts: 116
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 2232
tkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond repute
Re: Replaced IAC motor... Still stalling

Here's the sequence of events (LOL!)

- Last Tuesday, engine light comes on on start up. Checked pcode and got p0505. Jeep stalled at ever stop on the way home.
- Last Thursday, installed new O2 sensors.
- Last Friday morning, had new IAC motor put in.
- Last Friday evening, left for our of town and Jeep ran great.
- Sat. night left cabin lights on all day and drained battery. Jumped and was fine.
- Returned home on Sunday evening, everything was fine.
- Today, stalling began on way home from work. I think it began after turning the AC on. So I tested the engine with the AC off- no stall but very rough and low idle on stop.

ETA: In the past 10 months I've had a new fuel filter, new TPS, new plugs, new o2 sensors and new IAC motor.
__________________


2004 Grand Cherokee SE i6 | 2" BB with Daystars and brand spankin' new Bilstein 5100s | Summut Racing slotted & dimpled ultimate performance front rotors and power stop ceramic pads | JK Rubicon wheels w/ 245/70/R17 General Grabber AT2s

Reply With Quote
  #4  
Old 05-08-2012, 05:56 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,645
Thanks: 9
Thanked 54 Times in 52 Posts
Rep Power: 525443
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: Replaced IAC motor... Still stalling

But did you check for an eventually fault code set? I would have a look at the IAC stepper motor connector if its completely locked.
And you could try a complete reset, disconnecting the battery one more time for a few minutes and see how it goes.
And if this doesnīt help, its maybe a good idea to check with a scanner with live data the TPS position at idle to be stable. I donīt know for the 4.0, but on my 4.7 its around 12 % in idle.
And when you changed the IAC stepper motor, was the IAC air canal checked and cleaned as well? A lot of oil residue will form overhere and gradually close the opening, causing rough and unstable idle. As you mentioned that it seemed to be starting when switching the AC on, at that point the IAC stepper motor is commanded to open a bit more, to compensate for the higher load from the AC compressor.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #5  
Old 05-08-2012, 06:46 PM
tkdgirl's Avatar
Member
My Jeep: 2004 4.0L WJ
 
Join Date: Feb 2011
Posts: 116
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 2232
tkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond repute
Re: Replaced IAC motor... Still stalling

Quote:
Originally Posted by Frango100 View Post
But did you check for an eventually fault code set? I would have a look at the IAC stepper motor connector if its completely locked.
And you could try a complete reset, disconnecting the battery one more time for a few minutes and see how it goes.
And if this doesnīt help, its maybe a good idea to check with a scanner with live data the TPS position at idle to be stable. I donīt know for the 4.0, but on my 4.7 its around 12 % in idle.
And when you changed the IAC stepper motor, was the IAC air canal checked and cleaned as well? A lot of oil residue will form overhere and gradually close the opening, causing rough and unstable idle. As you mentioned that it seemed to be starting when switching the AC on, at that point the IAC stepper motor is commanded to open a bit more, to compensate for the higher load from the AC compressor.
All good tips. It's going in on Friday for another look-see.
__________________


2004 Grand Cherokee SE i6 | 2" BB with Daystars and brand spankin' new Bilstein 5100s | Summut Racing slotted & dimpled ultimate performance front rotors and power stop ceramic pads | JK Rubicon wheels w/ 245/70/R17 General Grabber AT2s

Reply With Quote
  #6  
Old 05-14-2012, 08:32 AM
tkdgirl's Avatar
Member
My Jeep: 2004 4.0L WJ
 
Join Date: Feb 2011
Posts: 116
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 2232
tkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond repute
Re: Replaced IAC motor... Still stalling

Cracked intake gaskets. New one being installed now.
__________________


2004 Grand Cherokee SE i6 | 2" BB with Daystars and brand spankin' new Bilstein 5100s | Summut Racing slotted & dimpled ultimate performance front rotors and power stop ceramic pads | JK Rubicon wheels w/ 245/70/R17 General Grabber AT2s

Reply With Quote
  #7  
Old 05-20-2012, 07:22 PM
tkdgirl's Avatar
Member
My Jeep: 2004 4.0L WJ
 
Join Date: Feb 2011
Posts: 116
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 2232
tkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond reputetkdgirl has a reputation beyond repute
Re: Replaced IAC motor... Still stalling

Well, the new intake gasket didn't completely fix the problem. Still very unstable idle with a lot of sputtering and almost stalls. The RPMs fluctuate from around 500-1200.

So could it be a bad PCM?
__________________


2004 Grand Cherokee SE i6 | 2" BB with Daystars and brand spankin' new Bilstein 5100s | Summut Racing slotted & dimpled ultimate performance front rotors and power stop ceramic pads | JK Rubicon wheels w/ 245/70/R17 General Grabber AT2s

Reply With Quote
  #8  
Old 05-25-2012, 07:43 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,645
Thanks: 9
Thanked 54 Times in 52 Posts
Rep Power: 525443
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: Replaced IAC motor... Still stalling

No fault codes shown anymore? Where all lines and hoses connected properly? Sounds as some vacuum leak somewhere.
__________________

__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
High idle but clean intake and IAC port???? 4923CREW Engine Performance/Intake/Exhaust 4 10-30-2011 03:14 PM
EGR and IAC?? djcodered Grand Cherokee - WK 14 05-01-2011 01:31 AM
Brake Stalling Robert Palmer At The Track 10 06-27-2009 09:24 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:37 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community