1995 4.0 need help with this - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 08-14-2014, 10:28 AM   #1
Join Date: Aug 2014
Posts: 5
1995 4.0 need help with this

A few months ago my motor mount broke and the distributor shaft was broken. Ever since this happened it has not run correctly but at times...which is the strange part. It will crank fine and run fine for a little while til the engine warms up ususally. Then it starts knocking and ticking and loses power to a degree. Since the motor mount broke we replaced:
The distributor
The distributor cap
The distributor button
The distributor wire
Put on a new timing chain and timed it
Ran good for a few days then started doing the same thing

I have loosened the bolt on the distributor several times and adjusted it a little. This helps the noise go away temporarily but it always returns.

Talked to a guy who thought it may be fuel pressure related but it seemed strange it all started after the distributor was broken.

So I put on a new fuel filter - Ran good for about 2 weeks same thing.
Just did the Seafoam through the throttle body. ran for a little bit...maybe a day..then same thing

Any ideas? Fuel pump?
DavidT1980 is offline   Quote
Old 08-14-2014, 02:37 PM   #2
nateeendavie's Avatar
Join Date: Feb 2013
Posts: 39
Check the crankshaft position sensor mine went out on my 93 and it would run fine until it warmed up then it would all go to shit

nateeendavie is offline   Quote
Old 08-14-2014, 02:42 PM   #3
Join Date: Aug 2014
Posts: 5
Thanks a bunch! Been pulling my hair out on this mess. That's worth a shot.
DavidT1980 is offline   Quote
Old 08-15-2014, 04:17 PM   #4
Join Date: Aug 2014
Posts: 5
Well I put on a crankshaft position sensor and a coil just in case. Same thing happening. Anymore ideas? This is killin' me. Plus the $$.
DavidT1980 is offline   Quote
Old 08-17-2014, 04:21 PM   #5
andyldavis's Avatar
Join Date: May 2014
Location: Apopka, FL
Posts: 141
Sick 4.0

All things being equal: Are you getting any codes from the CEL?? That would be a good place to start. I assume all timing is good. You said that you adjusted the distributor- these distributors are not adjustable, the PCM adjusts the ground for timing +/- . I hope you did not use a CH07 RPT distributor from Oriley's, it will not work. At your fuel rail, is the pressure around 30# and when the vac line of the regulator is pulled does it jump to over 40#?? To me it seems more fuel related than timing. Check all grounds to body and engine. Check ground at e-brake for the fuel pump. Check fuel filter and pressure for pump or regulator. Think back to what was done if it ran fine before, something was not adjusted, not connected or broken when some of the other work was done.

Keep the rubber side down and
the shinny side up...........
andyldavis is offline   Quote
Old 08-19-2014, 02:54 PM   #6
Join Date: Aug 2014
Posts: 5
Thanks alot. I will check into those next.

DavidT1980 is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Refbacks are Off

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 06:11 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC