1991 YJ 4.0L dies when hot (tough one) - Page 2 - JeepForum.com

Reply
 
LinkBack Thread Tools
post #16 of 21 Old 10-05-2013, 08:15 AM
WDNewman
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2013
Location: Central Mississippi
Posts: 1,359
Quote:
Originally Posted by Akumakis View Post
Tried a few things, but not the CSPS yet.

Testing for resolution is tough. It takes a while to heat up to the point of quitting, and we tend to stop for beers when out 4beer4ing. Even enough downhill seems to give it sufficient time to rest.

As I have time to try things and test properly, I'll keep posting on it.

Thanks, all.
My money is on the CSPS. Your symptoms are exactly what mine were until I replaced the Crank shaft position sensor. Has not had a problem since.

WDNewman is offline  
Sponsored Links
Advertisement
 
post #17 of 21 Old 10-09-2013, 08:59 PM Thread Starter
Akumakis
Registered User
1991 YJ Wrangler 
 
Join Date: Sep 2012
Location: Kelowna
Posts: 9
Discussion was re cam pos sensor, not crank pos sensor. I replaced the latter prior to initial post; no effect. I see the cam pos sensor is in the distributor; I'll dig one out of a wrecking yard or buy one, and report back.

Quote:
Originally Posted by WDNewman
My money is on the CSPS. Your symptoms are exactly what mine were until I replaced the Crank shaft position sensor. Has not had a problem since.
Akumakis is offline  
post #18 of 21 Old 11-02-2013, 08:43 PM Thread Starter
Akumakis
Registered User
1991 YJ Wrangler 
 
Join Date: Sep 2012
Location: Kelowna
Posts: 9
Vss

Not the VSS. I disconnected it entirely, no effect at all. Doesn't run bad...I read that the VSS only affects idle when you come to a stop. In any case, no help there.

Bought a new distributor, which I've never replaced before, and contains the new cam pos sensor. I'll install and see if i can make it quit again. Cold weather making it trickier to test.
Akumakis is offline  
post #19 of 21 Old 11-02-2013, 10:03 PM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 22,833
Don't rule out the vss. There is one other possibility. Check the writing harness that goes down the firewall behind the battery that supplies the vss. It's a possibility that it is shorting. If the vss shorts it will take out the voltage for the vss. Mine was burned by the manifold and shorting.

Fault codes:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mean Max pics of everything:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

How to use Google to search the forum:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

No Start:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Que89YJ is offline  
post #20 of 21 Old 11-03-2013, 08:15 AM
Cajun90YJ
Registered User
1990 YJ Wrangler 
 
Join Date: Feb 2008
Location: SW Louisiana
Posts: 208
I have seen the pcm cause this issue, on 3 diff Chryslers, 95 jeep 4.0, dodge Dakota and an 06 TJ. The pcm would get hot after driving or engine running and the pcm would lose a ground internally. They would throw cam and crank codes, and a few others. it can throw any that the pcm grounds. You can usually cause it to die (after you get it cranked following the first stall) by tapping on the pcm with a screwdriver handle or something. DON'T BEAT IT! Light taps should do it if that is the cause.
Cajun90YJ is offline  
post #21 of 21 Old 11-04-2013, 01:57 PM Thread Starter
Akumakis
Registered User
1991 YJ Wrangler 
 
Join Date: Sep 2012
Location: Kelowna
Posts: 9
This is interesting. When the problem first occurred I suspected a sensor, or the ECU. I'll try your trick.

1991 Jeep YJ Renegade 4.0L
Akumakis is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome