Common ZJ Problems / Tutorial On How To Fix Them - Page 6 - 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 > Common ZJ Problems / Tutorial On How To Fix Them

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineToxic Brakes - 3000 PSI Braided Stainless Steel Brake LineCess Recovery Gear Snatch Tow Strap OffRoad @ ROCKRIDGE4WD

Reply
Unread 12-28-2012, 01:54 PM   #76
jeepgirl1321
Registered User
1997 ZJ 
 
Join Date: Dec 2011
Location: , new Hampshire
Posts: 65
Jeep issues continue.....

same issue as before. jeep will die all the time, whether it be that I am driving down the road, or pulling in and out of parking spots. HELP.

adjusted the crank shaft positioning, reset the PCM, made a bracket to make sure wires dont wiggle out of computer.

running out of ideas on what to fix, all i can think of is a stick of dynamite..... any one else know what the hell is going wrong with the stupid thing???

jeepgirl1321 is offline   Reply With Quote
Unread 12-28-2012, 02:12 PM   #77
cgcarpenter
Registered User
1997 ZJ 
 
Join Date: Jul 2012
Location: west covina, Ca
Posts: 638
Quote:
Originally Posted by jeepgirl1321
Jeep issues continue.....

same issue as before. jeep will die all the time, whether it be that I am driving down the road, or pulling in and out of parking spots. HELP.

adjusted the crank shaft positioning, reset the PCM, made a bracket to make sure wires dont wiggle out of computer.

running out of ideas on what to fix, all i can think of is a stick of dynamite..... any one else know what the hell is going wrong with the stupid thing???
Replace PCM. End of story.
cgcarpenter is offline   Reply With Quote
Unread 12-28-2012, 02:44 PM   #78
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,195
Quote:
Originally Posted by jeepgirl1321 View Post
adjusted the crank shaft positioning, reset the PCM, made a bracket to make sure wires dont wiggle out of computer.
Need more info...
Does wiggling the PCM connections have an affect on the way it idles?

How did you adjust the crank sensor?

Your looking at a bad crank sensor or bad PCM
ZeeJay1997 is offline   Reply With Quote
Unread 12-28-2012, 02:52 PM   #79
joe_keefer
Registered User
1994 ZJ 
 
Join Date: Jan 2012
Location: Scappoose, Oregon
Posts: 51
If the PCM proves fine. Test the crank sensor to see if its bad.
joe_keefer is offline   Reply With Quote
Unread 12-30-2012, 12:28 PM   #80
jeepgirl1321
Registered User
1997 ZJ 
 
Join Date: Dec 2011
Location: , new Hampshire
Posts: 65
replacing the pcm is my next step. and i went to jeep and had a tech adjust the crank shaft and of course he said that should fix it....

and before i had the bracket to prevent the wiggeling of the wires if you even thought about touching them it would studder and die.

jeepgirl1321 is offline   Reply With Quote
Unread 12-30-2012, 12:51 PM   #81
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,195
Quote:
Originally Posted by jeepgirl1321 View Post
had a tech adjust the crank shaft
Snake oil!
ZeeJay1997 is offline   Reply With Quote
Unread 12-30-2012, 12:52 PM   #82
970001zj
Registered User
1997 ZJ 
 
Join Date: Feb 2012
Posts: 1,985
__________________
http://www.jeepforum.com/forum/f22/its-jeep-grand-cherokee-you-1443132/#post14516738
970001zj is offline   Reply With Quote
Unread 12-30-2012, 01:05 PM   #83
jeepgirl1321
Registered User
1997 ZJ 
 
Join Date: Dec 2011
Location: , new Hampshire
Posts: 65
snake oil? hahahahaha
jeepgirl1321 is offline   Reply With Quote
Unread 12-30-2012, 01:20 PM   #84
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,195
ZeeJay1997 is offline   Reply With Quote
Unread 12-30-2012, 01:23 PM   #85
joe_keefer
Registered User
1994 ZJ 
 
Join Date: Jan 2012
Location: Scappoose, Oregon
Posts: 51
Supposedly it can be shimmed 1-2x. But for the cost it's best to just replace it.
joe_keefer is offline   Reply With Quote
Unread 12-30-2012, 01:46 PM   #86
ZeeJay1997
Registered User
1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,195
Quote:
Originally Posted by joe_keefer View Post
Supposedly it can be shimmed 1-2x.
To shim it would put it further away from the flywheel, weakening the Hall effect.

I can see why someone would try to push it towards the flywheel to get a better output. The closer to flywheel it is, the better it works. This introduces the risk of damaging the sensor because the flywheel contacts it when the engine turns.

So any attempt to adjust it is guesswork that no one should have to pay for.
ZeeJay1997 is offline   Reply With Quote
Unread 12-30-2012, 01:54 PM   #87
joe_keefer
Registered User
1994 ZJ 
 
Join Date: Jan 2012
Location: Scappoose, Oregon
Posts: 51
So then are they shimmed to start with? Then removed as needed? I've never needed to mess with one. Just repeating what I've read.
joe_keefer is offline   Reply With Quote
Unread 12-30-2012, 03:04 PM   #88
LouC
Registered User
2007 WK 
 
Join Date: Feb 2008
Location: NY
Posts: 1,242
They come with a paper spacer on the sensor end of the crank sensor (at least the OE ones do) that contacts the flywheel when you install it and when you start the engine the flywheel scrapes it off. That sets the gap to the proper distance. If you remove the crank pos sensor and reinstall it, you have to get another paper spacer (or fab one up) to get it set right.
My stalling problems on my ZJ went away when I had a new PCM installed.
LouC is offline   Reply With Quote
Unread 12-31-2012, 05:01 PM   #89
Jleming
Registered User
1996 ZJ 
 
Join Date: Sep 2012
Location: Charlotte, North Carolina
Posts: 60
I too had the same problems....I replaced the crank sensor, map sensor, spark plug wires, and cleaned the o2 sensors, and the iac... ended up just needing a new computer and starter....after those two fixes, haven't had any problems at all
Jleming is offline   Reply With Quote
Unread 01-28-2013, 10:08 AM   #90
theblackjack69
Registered User
1998 ZJ 
 
Join Date: Dec 2011
Location: East Northport, NY
Posts: 156
FYI, the 4.0 Timing Chain link goes to the fog light How to, somebody forgot to switch which link they copied lol
theblackjack69 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.