High Idle at start-up - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > High Idle at start-up

FS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitEngo winches available at www.rockridge4wd.com! Free shippFS: Wranger BRIGHT License Plate LED! Just $3! Great value

Reply
Unread 07-20-2009, 10:34 PM   #1
sinbad85
Registered User
2001 WJ 
 
Join Date: Nov 2008
Location: Meridian, Idaho
Posts: 770
High Idle at start-up

Does anyone have a fix for a 4.7 that will start at 2000 rpm then settle down and idle fine? I cleaned all the sensors (they are only 8 months old). I'm wondering if one went out again or maybe a o2 sensor,fuel reg/filter

Anyone got a fix for it.

Thanks

sinbad85 is offline   Reply With Quote
Unread 07-20-2009, 11:19 PM   #2
CULate
Registered User
1930 J-Series Truck 
 
Join Date: Mar 2009
Posts: 318
My 5.9 ZJ starts at about 1500 RPMs then comes down & all the mechanics I talk to tell me that it is normal. It has been checked for sensors IAC cleaned etc. I don't know about the 4.7.
CULate is offline   Reply With Quote
Unread 07-20-2009, 11:26 PM   #3
AL04WJ
Registered User
2004 WJ 
 
Join Date: Apr 2009
Location: Birmingham, AL
Posts: 146
My 4.0 had an issue where occaisonally it started at 2000 rpms, but not all the time. When it did this the check engine light came on sometimes. It turned out to be the throttle position sensor.
__________________
Julian
2004 Laredo 4" lift, 265/75/16 Duratracs, JCR Stage II sliders, ARB bumper and XD9000
AL04WJ is offline   Reply With Quote
Unread 07-21-2009, 07:42 AM   #4
Double E
2000 Laredo V8
 
Double E's Avatar
2000 WJ 
 
Join Date: Oct 2003
Location: Raleigh, NC
Posts: 3,463
Normal operation for mine.
__________________
2000 Laredo 4.7L Selec-Trac. 177K miles, Leather, 245 tires, tow package, crappy CD changer, full size spare, roof cross-rails & sunroof.
Changes & fixes: Rear Addco sway bar & greasble bushings, upgraded headlights, upgraded tail lights, new hood struts (replaced 2X), new rear hatchglass struts, new radiator (replaced 3X), new oil pressure sending unit (replaced 4X), 2 new speed sensors, 2 new door lock actuators, new ignition key cylinder, chrome front tow hooks, Mobil 1 Synthetic 5/30, Purolator Pure One oil filter, EBC slotted & dimpled rotors, EBC Greenstuff pads, new front shocks (replaced 3X), new rear shocks (replaced 2X), new IRO steering stabilizer, new timing chain cover, new water pump, thermostat, new thermostat housing, new high pressure power steering hose, Michelin-X radials, new sunroof assembly, new single-piece lug nuts, new exhaust manifold studs & gasket on driver's side, new Durango alternator. Jeepforum.com sticker, Visit cobaltboatsforum.com when you can!
Double E is offline   Reply With Quote
Unread 07-21-2009, 09:17 AM   #5
01Limited45324
Registered User
2001 WJ 
 
Join Date: Apr 2009
Location: Dayton, Ohio
Posts: 468
I have an 01 WJ with the 4.7 and it does the same. I posted on here but never got answers, so it's fairly normal. I notice mine does it after three conditions:
1) It's cold out
2) The key was put into the "on" position a few times without starting (i.e. getting codes, etc.)
3) After short trips (less than 7 miles)
__________________
-Tom

2001 Grand Cherokee Limited
2002 BMW 530i
01Limited45324 is offline   Reply With Quote
Unread 07-21-2009, 09:48 AM   #6
WJChris
Web Wheeler
 
WJChris's Avatar
1999 WJ 
 
Join Date: Nov 2007
Location: Santa Rosa, California
Posts: 2,547
search the TSB's at wjjeeps.com.

there is a TSB for this that requires a computer flash, expect an hour of labor at the dealership
WJChris is offline   Reply With Quote
Unread 07-21-2009, 09:57 AM   #7
WJChris
Web Wheeler
 
WJChris's Avatar
1999 WJ 
 
Join Date: Nov 2007
Location: Santa Rosa, California
Posts: 2,547
correction: .5 hrs

here is the TSB:

http://www.wjjeeps.com/tsb/tsb_wj_1801202.pdf
WJChris is offline   Reply With Quote
Unread 07-21-2009, 02:08 PM   #8
sinbad85
Registered User
2001 WJ 
 
Join Date: Nov 2008
Location: Meridian, Idaho
Posts: 770
Looks like we all have a problem, I hate to say something is normal just because some people have the problem, I replaced both sensors on the TB when it started idling high at start up and the problem went away. That was only about 7 months ago so why did it come back? bad sensors again?

Any way thanks for the input guys,
sinbad85 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.