Jeep hits a bump or turn and dies randomly - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-03-2014, 08:51 PM   #1
Newb
 
Jordanf1771's Avatar
 
Join Date: Jun 2014
Posts: 10
Jeep hits a bump or turn and dies randomly

I have been through hell and back the past two weeks with my 94 wrangler with a 2.5 liter. I've been having a problem where randomly if I take a turn hard or hit a bump my engine will just shut off. Then if I wait 15 seconds or so it fires right back up. In the past two weeks I've changed the fuel pump, fuel filter twice, ignition coil, and spark plug wires. I know this doesn't sound too bad but it randomly dying has put me in some rough situations. Please help me.

Jordanf1771 is offline   Quote Quick Reply
Old 06-03-2014, 09:51 PM   #2
Jeeper
 
mijeeper80's Avatar
 
Join Date: Mar 2014
Posts: 530
Sounds like an electrical issue, start engine n start shaking wires is what I would try first

mijeeper80 is offline   Quote Quick Reply
Old 06-03-2014, 10:03 PM   #3
Jeeper
 
jordan yj's Avatar
 
Join Date: Mar 2013
Location: North eastern New Mexico, Four Corners area
Posts: 156
I agree with mijeeper80. Almost has to be electrical. I would look at the wiring for all your major electrical components first. Check your alternator and battery and ignition wires. Look closely for loose connections and pay close attention for anywhere a wire might be rubbing something else. So you know what I mean, if you distributor wiring is rubbing on the block it could be shorting out and your distributor gets no juice, so you spark plugs get no juice, so your engine dies. Start there and let us know what you find.
jordan yj is offline   Quote Quick Reply
Old 06-04-2014, 02:43 AM   #4
Jeeper
 
B.LaBrier's Avatar
 
Join Date: Jan 2014
Location: New Florence, Missouri
Posts: 88
I had a problem similar to this on an old pick up that i had. Check to make sure that the positive connection that goes from the battery to the starter and alternator are both in good condition and don't have any cuts, or bad build up on them.
B.LaBrier is offline   Quote Quick Reply
Old 06-04-2014, 06:50 AM   #5
Newb
 
Join Date: May 2014
Posts: 11
Of not being there we are all stabbing the dark, but I have had major issues with my grounds causing havoc in the past. Remember you will have bat/ engine & engine/frame & body to Frame. I have seen a perfectly good looking cable ohm out but under a starting load fail. But usually making sure they are fresh and clean metal to metal and you are good. This not a starting issue but an entire ignition/harness failure. Ground in the first common denominator. Then move to the wiring under the relay panel.
And never trust an ignition switch either depending in the year Jeep.
Good luck and keep us posted.
Freeman94 is offline   Quote Quick Reply
Old 06-04-2014, 03:24 PM   #6
Newb
 
Jordanf1771's Avatar
 
Join Date: Jun 2014
Posts: 10
Well it's gone from dying randomly to now it won't start up at all. Just turns over and nothing else. I cleaned the battery terminals and the grounds to the alternator and starter.....none of them bad enough to make it die like that. Ignition switch?
Jordanf1771 is offline   Quote Quick Reply
Old 06-04-2014, 05:02 PM   #7
Newb
 
Join Date: May 2014
Posts: 11
I would nail down a few basics. Like is it getting fuel? Is it getting spark? And man I hate guessing with another mans money especially without being there to help test all the variables.
What year is your Jeep? The older chevy ign switches are always suspect with age.
Freeman94 is offline   Quote Quick Reply
Old 06-04-2014, 05:05 PM   #8
Newb
 
Jordanf1771's Avatar
 
Join Date: Jun 2014
Posts: 10
Meh. I have given up. Getting it towed to the garage tomorrow. I'm assuming it's gonna be the simplest of fixes and the mechanics gonna think I'm an idiot. Also, I'm sick of wasting money on things that probably didn't need changed. I'll let you all know what the problem was.
Jordanf1771 is offline   Quote Quick Reply
Old 06-04-2014, 05:50 PM   #9
Jeeper
 
Join Date: Feb 2014
Location: Monroe, Or
Posts: 638
2 best things you can invest in is a Auto Multimeter and a FSM.

Using the FSM you can use the Multimeter to TEST a bunch of stuff and see if it's working within specs.

Makes troubleshooting a whole ton easier
__________________
1993 YJ 4.0, 5 Speed, 3.55 (for now)
2000 Durango 4.7, 5 Speed Auto, 3.92
TrailBlazing Gear Post
Project Ole Grey
Locruid is offline   Quote Quick Reply
Old 06-04-2014, 05:55 PM   #10
Jeeper
 
jordan yj's Avatar
 
Join Date: Mar 2013
Location: North eastern New Mexico, Four Corners area
Posts: 156
When was the last time you changed your fuel filter? I know your tired of swapping parts, but you can take it off and you should be able to blow through it easily. If you can't it's clogged and then grab a new one a throw it in. If you can just put it back. Cheap part and easy to diagnose.
jordan yj is offline   Quote Quick Reply
Old 06-04-2014, 07:38 PM   #11
Newb
 
Jordanf1771's Avatar
 
Join Date: Jun 2014
Posts: 10
I changed the filter day before I changed the fuel pump. I forgot to mention this all started when I trusted a friend to weld my frame and fix some body mounts. Granted, he did a decent job but ever since he took my gas tank out to weld the back part of the frame it has literally been problem after problem and me thinking each time the problem is fixed. But as you can imagine after 2 filters and a pump I've been covered in more gas this last two weeks than I care to think about.
Jordanf1771 is offline   Quote Quick Reply
Old 06-04-2014, 07:45 PM   #12
Jeeper
 
MrWROLguy's Avatar
 
Join Date: Mar 2014
Location: Texas
Posts: 222
Images: 1
Quote:
Originally Posted by Jordanf1771 View Post
I changed the filter day before I changed the fuel pump. I forgot to mention this all started when I trusted a friend to weld my frame and fix some body mounts. Granted, he did a decent job but ever since he took my gas tank out to weld the back part of the frame it has literally been problem after problem and me thinking each time the problem is fixed. But as you can imagine after 2 filters and a pump I've been covered in more gas this last two weeks than I care to think about.
Did you guys remove the battery cables before you started welding? If not you fried some wiring or killed the computer. If you used a wire welder probally not so much.... Dropped tank problem started probally a pinched wire kinked fuel hose.
Probally a lose ground.
__________________
A Jeep Factory Service Manual is your best friend.
MrWROLguy is offline   Quote Quick Reply
Old 06-04-2014, 07:56 PM   #13
Jeeper
 
jordan yj's Avatar
 
Join Date: Mar 2013
Location: North eastern New Mexico, Four Corners area
Posts: 156
What he said^^
jordan yj is offline   Quote Quick Reply
Old 06-04-2014, 08:01 PM   #14
Newb
 
Jordanf1771's Avatar
 
Join Date: Jun 2014
Posts: 10
He did use a wire welder. I would not be surprised if it's a pinched fuel hose.
Jordanf1771 is offline   Quote Quick Reply
Old 06-04-2014, 08:34 PM   #15
Newb
 
Join Date: May 2014
Posts: 4
I had a similar problem with my 94 YJ/SE I6 4.0 ... turned out to be a pressure leak in the fuel pump and a fouling (fuel pressure regulator) ... when your fuel pump gets too hot the sensor relay switch in your under-the-hood fuse box trips and kills your engine ... Your ECM is programmed to do that! ... My Jeep wouldn't even turn over. If you waited a little while it would start right up like nothing happened ... 3 different mechanics said it was an electrical issue... If you stick your fuel pump in a bucket of gas and start the engine that's the only way to see the bubbles...
One last note ... make certain you connected the fuel-lines correctly when you remounted the gas tank!
stevegaran is offline   Quote Quick Reply
Old 06-06-2014, 12:45 PM   #16
Newb
 
Jordanf1771's Avatar
 
Join Date: Jun 2014
Posts: 10
Turned out to be the crank sensor. Haha fml. Thanks for all the input though guys. Much appreciated.
Jordanf1771 is offline   Quote Quick Reply
Old 06-06-2014, 12:59 PM   #17
Jeeper
 
jordan yj's Avatar
 
Join Date: Mar 2013
Location: North eastern New Mexico, Four Corners area
Posts: 156
Quote:
Originally Posted by Jordanf1771 View Post
Meh. I have given up. Getting it towed to the garage tomorrow. I'm assuming it's gonna be the simplest of fixes and the mechanics gonna think I'm an idiot. Also, I'm sick of wasting money on things that probably didn't need changed. I'll let you all know what the problem was.
At least you don't have to feel "like an idiot" now that you know it was a crank sensor. Glad you got it running again.
jordan yj is offline   Quote Quick Reply
Old 06-06-2014, 03:28 PM   #18
Jeeper
 
Join Date: Apr 2014
Posts: 124
So, is there a way to diagnose a crank sensor easily? Is there a check engine light or some other indication that that is the problem?
saberworks is offline   Quote Quick Reply
Old 06-06-2014, 04:01 PM   #19
Newb
 
Jordanf1771's Avatar
 
Join Date: Jun 2014
Posts: 10
I didn't talk to the mechanic about it so I'm not really sure how they came to that conclusion. I thought it was pretty wild that the sensor didn't just quit. It took like several days for it to give out.
Jordanf1771 is offline   Quote Quick Reply
Old 06-07-2014, 09:50 AM   #20
Jeeper
 
Join Date: May 2014
Location: Maryland
Posts: 103
nevermind...
__________________
Happy Trails!
JeepJeep_YJ is offline   Quote Quick Reply
Old 06-07-2014, 01:08 PM   #21
Jeeper
 
Join Date: Feb 2014
Location: Monroe, Or
Posts: 638
Quote:
Originally Posted by saberworks View Post
So, is there a way to diagnose a crank sensor easily? Is there a check engine light or some other indication that that is the problem?
Crank sensors can be temperamental at times. They USUALLY just up and quit but there can be an odd duck or 2.

Yes they are SUPPOSED to throw a CEL light but not always.

And yes there is a test you can do to test the sensor.

__________________
1993 YJ 4.0, 5 Speed, 3.55 (for now)
2000 Durango 4.7, 5 Speed Auto, 3.92
TrailBlazing Gear Post
Project Ole Grey
Locruid is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum 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 email address for yourself.
Email Address:

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.



Thread Tools

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 Off
Refbacks are Off




Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:51 PM.



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