engine coughs, shudders hard and dies after hour on highway - JeepForum.com
LinkBack Thread Tools
post #1 of 1 Old 07-08-2011, 04:00 PM Thread Starter
Registered User
1987 YJ Wrangler 
Join Date: Jul 2011
Location: Denver
Posts: 1
engine coughs, shudders hard and dies after hour on highway

hello, new to forum posting, so bear with me.
I have an 87 yj I got cheap cause of a bent frame and bad pukegoat tranny.
Completely rebuilt the thing using donor parts from 90 yj and others. Put in 4.0 from rearended 91 xj (95,000m). Got a rebuilt ax15 also. All installed by me july 2010. Replaced the timing chain at install. reman ecm from autozone. Wiring harness is xj from firewall forward, and 87 back. Everything but altenator and few sensors replaced, multimeter readings were within specs. Checked with timing light and runs at 12 btdc. Could never correct it. Ran great locally.
Fast forward july 2011. Decided to move from gulf coast MS to Denver. Ran from MS to abilene, tx with no issues except it struggled to maintain 7omph, especially on inclines. I would press pedal to the floor with hardly any response. Stopped for gas in abilene and there was alot of oil underneath my jeep. Opened the hood and it appeared to be coming from the front ccv tube that used to be connected to the air box (went to cold air and never hooked up the tube from the valve cover). Oil was sprayed all inside drivers side from the open tube back (brake booster/ reservoir, underside of hood, recesses of intake manifold- all soaked). I added some oil at that time (1qt). I got back on the highway and had very little power (40' rv's were passing me- HOW EMBARRASING!) Did I mention it was 107 degrees out. Anyway, I got about 80 miles into the desert and my engine "coughed" (sounded like it was in the oil pan), the entire jeep started shuddering violently, lost all power, started stumbling and as i pulled to the side it died. It would not start up unless I waited a few minutes. It turned over but wouldn't start. After about 5 minutes it would start only to repeat after a a minute or two. I limped down the road for 20 miles (took me 3 hours to get to the next town) stalling and coughing,and dying. The temp guage never went above 210, not overheated. Replaced fuel pump,filter, ignition coil. still same thing happens after about 40 minutes on highway. Mechanics wouldn't spend enough time with it to recreate the issue. Gonna check compression this weekend. (got it transported to denver after being stuck in lubbock for 10 days).
Repaired an o2 wire (black/lt blue-common sensor wire) that was melted against exhaust manifold, but i am reluctant to be confident this was the issue. It would suck to be on mountain pass with a dead engine. Anyone I talk to just shakes their head like I'm speaking japanese>
Please if anyone could point me in the right direction as I am a jeep owner and have very little money left. We all know what JEEP stands for (just empty every pocket)
Thanks in advance

dljeepbiatch is offline  

engine , oxygen sensor , timing

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
Engine dies at highway speeds. brilew58 YJ Wrangler Technical Forum 8 05-14-2011 02:57 PM
92 YJ 2.5 engine coughs!! solution Cone YJ Wrangler Technical Forum 12 05-12-2010 06:40 AM
97 TJ dies while driving, hour later starts up. Longoddr1 TJ Wrangler Technical Forum 11 01-14-2008 02:25 PM
HELP...hard and low idle engine dies simba1 TJ Wrangler Technical Forum 6 09-13-2007 03:18 AM
Engine dies when I brake hard Jabba TJ Wrangler Technical Forum 16 12-14-2004 07:50 PM

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