Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here! ZJ (93-98), WJ (99-04), WK (05+)
All ZJ/WJ/WK specific tech questions asked here!

2004 grand Cherokee

Old 02-13-2019, 03:36 PM
  #1  
Newbie
Thread Starter
 
Join Date: Feb 2019
Posts: 1
Model: Cherokee (XJ)
Default 2004 grand Cherokee

When I start my Jeep itís starts running rough my idle jumps pas 1000 rpms and goes up and down as if itís gonna stall out and then when the engine warms it calms down than every now and then when I get to a stop sign or red light itís starts running rough again and when I take off it spits like it doesnít wanna drive what could be my problem I got it scanned and no misfire codes came up
Rich Boul is offline  
Old 02-17-2019, 10:30 AM
  #2  
CF Veteran
 
peep's Avatar
 
Join Date: Oct 2010
Location: Ontario, Canada
Posts: 2,137
Year: 1989 Laredo
Model: Cherokee
Engine: 4.0 L 6 Renix
Default

From the described symptoms I's most suspect the IAC Idle Air Control Valve/Motor, located upon the throttle body.
One electrical connect and two torx drive screws to remove. Easy on that o ring, you will need it for reinstall.
Treat the internal pintle gently, but clean the probable dirty build up with alcohol scrub and brother in law's tooth brush.
You can us the in laws Devils Cut Whisky as the alcohol, better results than letting him drink it.
Put the tooth brush back in his night stand afterwards.
A new one cost $75 cdn at Napa, much less in the USA. Dispose of old one in brother in laws sock drawer, it will improve the smell.

If it's not that a fuel pressure test would help diagnosis, should have 40+ psi, low pressure can still run but be more prone to fuel line vaporisation issues, say sitting idling at red light?
Temperature sensor can also provide that intermittent roughness but usually throw a code.
Be interested in your findings.
peep is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
flyingcowboy
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
1
01-10-2019 09:54 AM
jaski2
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
2
03-11-2009 02:18 PM
red04cavy
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
5
02-22-2009 07:44 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: 2004 grand Cherokee


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description: