Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Engine Performance/Intake/Exhaust

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 08-18-2010, 08:29 AM
Member
 
Join Date: May 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1602
j-lien is on a distinguished road
High idle

Have a 2001 GC limited nothing but a problem child (Just Expect Every Problem) anyway on cold start up and somtimes when it is warm as well but not as often. When first starting for the day revs to around 2500 RPMS an then goes down, when warm at a idle in park or at stop sign idles arounf 500-600 rpm then flares up to about 1100 or so and goes back and forth. No codes at all and when it revs to around 2500 rpms it smells like raw gas. I have no fuel leaks anywhere, decided to look at over head council as well when driving somtimes the same smell but the rpms are normal. when driving the instant mpg do not change thinking that if it was running rich my instant miles would droup dramatically. I am thinking the tps but i am not sure.
__________________

__________________
Reply With Quote
  #2  
Old 08-18-2010, 08:47 AM
StoneCold's Avatar
Senior Member
My Jeep: 2000 4.7L WJ
 
Join Date: Feb 2010
Location: Bankfoot, Scotland
Posts: 3,220
Thanks: 8
Thanked 28 Times in 27 Posts
Rep Power: 153458
StoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond reputeStoneCold has a reputation beyond repute
Garage
Re: High idle

Try leaning out the throttle body and the idle air control valve. I'm thinking more the IAC valve than anything, because when you stop, it's that that takes over from the throttle body in getting air into the engine
Clean it thoroughly though and don't get any cleaner on the actual sensor.


If that doesn't work then it could well be faulty sensors, either the TPS or the IAC. Easy fix, just plug and play. I'm not sure what's causing the gas smell though
__________________

__________________
Tinted tails - Custom intake with mushroom filter - Superchips performance tuned - 20" SRT reps - Alcantara headliner - Magnaflow exhaust - Roush performance tips - LED conversion - Carbon Fibre/Alcantara interior - 20% tint -Bright Jeep pedals - Matte black viper stripes - Gauge pod - Gen 3 halo projectors & HID's - Airbrushed engine bay - Mesh grille - Snakeskin green calipers and accents(inspired by DAVY27)

www.facebook.com/stonecoldpaintwerks
Reply With Quote
  #3  
Old 08-19-2010, 08:12 AM
Member
 
Join Date: May 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1602
j-lien is on a distinguished road
Re: High idle

sounds good i will try that, thank you.
__________________
Reply With Quote
  #4  
Old 11-14-2010, 04:48 PM
Member
My Jeep: 1999 4.7L WJ
 
Join Date: Apr 2010
Posts: 51
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1668
ilirdino is on a distinguished road
Re: High idle

Any updates on this? Did you clean the IAC valve, replace the sensor, or both?

Thanks!
__________________
'99 Jeep Grand Cherokee Limited (4.7V8)
*K&N 77, Akebonos, and Flowmaster 50
**Addco Rear Sway, chrome grill, V3 Projectors, and HID lows next on the agenda
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
Idle at what RPM? White05 Grand Cherokee - WK 4 06-17-2010 12:07 PM
Idle/Stalling problem citizinsoldier11B Engine Performance/Intake/Exhaust 8 04-22-2010 10:05 AM
Odd idle when shifting... Martyp Grand Cherokee - WK 25 08-17-2009 05:58 PM
Crap Idle? 4.7 V8 NHWK05 Troubleshooting/Problems Discussion 23 06-18-2009 03:21 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:07 PM.


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