What other parts to replace? - JeepForum.com
LinkBack Thread Tools
post #1 of 3 Old 03-08-2010, 03:22 PM Thread Starter
Registered User
2006 LJ Wrangler 
Join Date: Apr 2004
Location: Central PA
Posts: 98
What other parts to replace?

94 YJ 2.5L. About 40k on new motor. Sporadically will NOT start. Turns over fine, fuel at rail at proper pressure, compression good on all 4 cyl. New coil, plugs, wires, distributer, coil pickup, correct voltage to coil from ecm when cranking. Checked sensor in bell housing, passes chilton's manual test. When it runs, it is perfect (for a 2.5 anyhow). I went to leave work, turned over but wouldn't start. Walked home, got truck, returned to work to pick up stuff (maybe 15 minutes later), just for hell of it, tried the key and the jeep started right up. Can't duplicate when it is at garage, have had 3 different mechanics work on it, no codes on computer. Completely random, has done it when dry, wet, hot, cold, etc. No pattern that I can find. Any suggestions?

mudbugII is offline  
Sponsored Links
post #2 of 3 Old 03-08-2010, 04:53 PM
Registered User
1994 YJ Wrangler 
Join Date: Dec 2008
Location: mn
Posts: 1,479
Could be that the CPS connector is intermittant. Used to have that problem on my kids comanche. Wound up just cutting off the plugs and soldering it. Never had a problem after that.

Chuck P
94 YJ 2.5L/AW4 (Gone)
98 ZJ Limited 5.2 - sons car
97 TJ 2.5L/30RH - daughters car

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
My site
TheRealOldjeep is offline  
post #3 of 3 Old 03-08-2010, 05:15 PM
Registered User
1991 YJ Wrangler 
Join Date: Apr 2008
Location: Meridian
Posts: 2,565
When this problem presents it'self,... when the ignition is first turned on, and before you go to start... Does the CEL lamp come on? It should, which would mean the ECM is powered up and then in-turn the fuel pump and ASD relay. If the CEL lamp does not light when the ign is first turned on, then likely you have bad capacitors in the ECM and it is easily/cheaply fixed. If the CEL does not initially light, will it do so if you what a spell?
idaholtby is offline  

Quick Reply

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


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

Email Address:


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

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
johnny joints to replace replace re rubber cmc1 TJ Wrangler Technical Forum 6 06-16-2009 05:50 PM
Need to replace some parts. BEACHSAND TJ Wrangler Technical Forum 0 10-23-2008 03:31 PM
Hole in front softtop window...what parts to replace? Evil_Ed JK Wrangler Technical Forum 3 08-01-2008 02:53 PM
97 Wrangler: What parts should I replace for a damaged float arm? NORCALROOTS TJ Wrangler Technical Forum 0 05-19-2008 04:32 PM
Regearing - Which parts to replace? Meir10 JK Wrangler Technical Forum 17 11-30-2007 05:46 AM

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