98 ZJ is stalling out - 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 > 98 ZJ is stalling out

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineRubicon Express Suspensions from CCOR 706-207-4140Smittybilt Hard Tops @ Oconee Off-Road! 706-534-9955

Reply
Unread 05-30-2013, 01:05 PM   #1
islangink
Registered User
1998 ZJ 
 
Join Date: Mar 2013
Location: king george, VA
Posts: 11
98 ZJ is stalling out

I've read about the stalling problems with the zjs but none to fit my circumstances. I have a 98 grand Cherokee 4.0 4wd and it's been stalling lately and not wanting to start. I live n VA so the weather is changing. I never had any issues with it until it got hot outside we had a few cool days n I had no problems yesterday n today are hot n its stalling out again. I changed the plugs n wires n backed the screws outta the pcm 1/4 inch n it didn't help. Now I'm thinking it's not the pcm b/c if I spray just a tad of starting fluid n the air filter it starts right up n runs good n strong until I come to a stop then it dies or sometimes as I'm coming to a stop it stalls. Could someone please help me?

islangink is offline   Reply With Quote
Unread 05-30-2013, 04:39 PM   #2
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Sounds like a dying fuel pump to me.

When is the last time you cleaned the IAC?

Did you replace the distributor cap and rotor when you did the plugs and wires? Original coil?
JasonStebbins is offline   Reply With Quote
Unread 05-30-2013, 06:41 PM   #3
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,448
Quote:
Originally Posted by JasonStebbins View Post
Sounds like a dying fuel pump to me.
I vote for this one!
ZeeJay1997 is offline   Reply With Quote
Unread 05-31-2013, 05:08 AM   #4
islangink
Registered User
1998 ZJ 
 
Join Date: Mar 2013
Location: king george, VA
Posts: 11
I was thinking it was a problem with the fuel too b/c of it starting when I juice it a little.... Damn I was just hoping it was something simpler. I I will clean the IAC this morning and report back after I do that and run a pressure test on the fuel line when it doesn't want to start. I did replace the distributor n rotor. I noticed it only does it when it's above like 75 or 80 degrees outside. Thanks for ur feedback

Last edited by islangink; 05-31-2013 at 05:19 AM..
islangink is offline   Reply With Quote
Unread 05-31-2013, 06:22 AM   #5
Rich93ZJ
Registered User
1993 ZJ 
 
Join Date: Sep 2012
Location: Richland, Ga
Posts: 454
When it dies, can you hear the pump running? Are all of your gauges working when the stall happens?
Rich93ZJ is offline   Reply With Quote
Unread 05-31-2013, 06:54 PM   #6
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
The fuel pump is actually a really easy job. You just unbolt the straps that hold the tank and drop it down. Unplug the evap line, power and fuel line and unscrew the plastic thing that holds the pump down. It's really that simple.

I would highly recommend new straps. Mine fell apart after I removed them. I'm surprised they didn't crumble off when I hit pot holes.

Don't buy AirTex fuel pumps and don't do this with 3/4 of a tank if possible. Mine died after I put $50.00 in.

I got the Bosch fuel pump (excellent reviews on the forum) for around $180.00 shipped from RockAuto. After the AirTex left me stranded in the woods TWO WEEKS after I installed it.
JasonStebbins is offline   Reply With Quote
Unread 05-31-2013, 07:50 PM   #7
dellis
Registered User
1998 ZJ 
 
Join Date: Feb 2013
Location: Vienna, VA
Posts: 313
Quote:
Originally Posted by JasonStebbins View Post
The fuel pump is actually a really easy job. You just unbolt the straps that hold the tank and drop it down. Unplug the evap line, power and fuel line and ...
Easy in theory, but it is not necessarily easy for every situation. One of the straps gave me fits even with lots of soaking in Kroil. And, removing and reinstalling the fuel & evap lines took two people tugging and pulling and pushing.

But it's done.
dellis is offline   Reply With Quote
Unread 06-01-2013, 10:51 AM   #8
islangink
Registered User
1998 ZJ 
 
Join Date: Mar 2013
Location: king george, VA
Posts: 11
I finally got to an auto parts store n got a code indicating a faulty crank sensor.... I'm gonna install it this weekend n see what happens
islangink is offline   Reply With Quote
Unread 06-01-2013, 12:10 PM   #9
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,448
i'm really surprised no one has said that yet.

what brand crank sensor did the parts store sell you?
ZeeJay1997 is offline   Reply With Quote
Unread 06-01-2013, 06:54 PM   #10
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Quote:
Originally Posted by ZeeJay1997 View Post
i'm really surprised no one has said that yet.

what brand crank sensor did the parts store sell you?
Don't use a parts store brand CPS.

MOPAR sensors only in Jeeps.

I was going to say CPS but I always say that. He didn't mention the CEL was on.
JasonStebbins is offline   Reply With Quote
Unread 06-01-2013, 07:00 PM   #11
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,448
Quote:
Originally Posted by JasonStebbins View Post
MOPAR sensors only in Jeeps.
Mine has been running with a Sorenson for 5 years. It may go out tomorrow, but it hasn't self destructed yet. I didnt want to pay the price for a Mopar then, but someone posted a link in another thread to a site that had Mopar for 56 bucks. If anyone finds it, please let me know.
ZeeJay1997 is offline   Reply With Quote
Unread 06-01-2013, 07:12 PM   #12
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Quote:
Originally Posted by ZeeJay1997 View Post
Mine has been running with a Sorenson for 5 years. It may go out tomorrow, but it hasn't self destructed yet. I didnt want to pay the price for a Mopar then, but someone posted a link in another thread to a site that had Mopar for 56 bucks. If anyone finds it, please let me know.
Never heard of Sorenson. I've cheaped out on sensors and that's why I know Mopar/NTK are the only ones that really work or have any type of lifespan.

Got my Mopar CPS for $65.00 shipped on eBay. It's collecting dust until I need it.
JasonStebbins is offline   Reply With Quote
Unread 06-01-2013, 07:14 PM   #13
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,448
Nevermind here it is
ZeeJay1997 is offline   Reply With Quote
Unread 06-01-2013, 07:17 PM   #14
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,448
I paid about 60 bucks for the Sorenson 4-5 years ago. At that time, the only place I could find a mopar was at the dealer and they wanted 130 bucks
ZeeJay1997 is offline   Reply With Quote
Unread 06-01-2013, 07:17 PM   #15
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Hmm. I've been to a few of the Mopar sites. That's really cheap. Are those "Your price" prices temporary?
JasonStebbins is offline   Reply With Quote




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.