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!

won't start unless throttle wide open

Thread Tools
 
Search this Thread
 
Old Oct 17, 2010 | 12:46 PM
  #1  
alan sauer's Avatar
Thread Starter
Newbie
 
Joined: Oct 2010
Posts: 8
Likes: 0
Model: Cherokee
Default won't start unless throttle wide open

HI My normally completely reliable 94 grand cherokee has a problem. In the past if I just turned the key it would start. Acouple of time last week it would not start right away but would start after a few tries At the store the other day it wouldn't start I about gave up For some reason I held down the gas pedal and it started let the pedal go it would stall .Got it restarted again ,drove it home,I needed to use one foot on gas and one on brake when at stop signs.I want to guess sensor but not sure maybe fuel filter? I always have done my own repairs ,Just don't like to guess Alan
Reply
Old Oct 17, 2010 | 02:03 PM
  #2  
Bustedback's Avatar
CF Veteran
 
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Default

You need a new Idle Air Control motor. Very simple to replace and inexpensive, about 40 bucks at NAPA. The new IAC motor will be the updated motor, the original motors had some problems.
Reply
Old Oct 17, 2010 | 02:17 PM
  #3  
alan sauer's Avatar
Thread Starter
Newbie
 
Joined: Oct 2010
Posts: 8
Likes: 0
Model: Cherokee
Default

Thanks Bustedback I'll get it after work tomorrow I'll do the fuel filter too Alan
Reply
Old Oct 17, 2010 | 02:38 PM
  #4  
Bustedback's Avatar
CF Veteran
 
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Default

Once you install it you'll have to let the PCM do kind of a relearn in order to get the engine to hold an idle. Just start the engine and keep it running, after a few minutes the engine should hold an idle and adjust when needed. You don't have to remove the throttle body, but you will need the correct size Torx bit for the two screws that hold it on.
Reply
Old Oct 17, 2010 | 02:53 PM
  #5  
alan sauer's Avatar
Thread Starter
Newbie
 
Joined: Oct 2010
Posts: 8
Likes: 0
Model: Cherokee
Default won't start unless throttle is wide open

Thats great I just went out to look at the motor to see what was involved ,fuel filter and iac should not be that difficult for me I do almost all of my own repairs I've just not had any problems with this Jeep in 7 years about.I've owned 7 jeeps in my time Actually rust was my biggest problems with most of my jeeps CJ-7's I'll let you know how it works out Alan
Reply
Old Oct 23, 2010 | 10:32 AM
  #6  
alan sauer's Avatar
Thread Starter
Newbie
 
Joined: Oct 2010
Posts: 8
Likes: 0
Model: Cherokee
Default idle air control motor

Bustedback thanks for the advice I had to work all week,so I just put the part in this morning .I turn the key It started right up I took it for a little ride It idles just like it used too Thanks again Alan
Reply
Old Oct 23, 2010 | 11:46 AM
  #7  
Bustedback's Avatar
CF Veteran
 
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Default

My pleasure.
Reply
Old Oct 23, 2010 | 12:05 PM
  #8  
Ender's Avatar
Senior Member
 
Joined: Mar 2010
Posts: 855
Likes: 1
From: Southern California
Year: 1989 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
Default

Great when a plan comes together! Great Job!
Reply
Old Oct 24, 2010 | 01:10 PM
  #9  
jack1981's Avatar
Junior Member
 
Joined: Sep 2010
Posts: 80
Likes: 0
Model: Cherokee
Default

Or you could try to clean the old IAC
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
seansr
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
13
Oct 20, 2025 02:48 PM
Tj Cope
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
21
Nov 16, 2022 08:32 PM
Gtrsrlly
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
Aug 25, 2015 11:50 AM
smithj
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
Aug 24, 2015 10:24 PM
Brynjaminjones
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
Aug 22, 2015 05:01 AM

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



All times are GMT -5. The time now is 10:23 PM.