jeep wont start occasionally - 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
Old 05-25-2013, 02:25 PM
Thread Starter
Join Date: May 2013
Posts: 1
kd5hhx is on a distinguished road
jeep wont start occasionally

I have a 1995 Jeep Wrangler Sahara 4.0L

occasionally the engine will crank and want to turn over but seems like it wasn't getting enough fuel.

so I checked the fuel pressure by pressing the fuel test port while the key was in the on position.

when I do, I can hear the fuel pump turn on and I have pressure for a second then I will hear a click from the fuse box and the fuel pump will stop and I loose pressure. it doesn't try to maintain pressure while the key in on

this test was preformed during a period where it started just fine. I haven't checked it during a period where it didn't start as that seems to be a random occurrence

there may also be a relation to temperature because I first noticed that it wouldn't start in cold temperatures around or below freezing now it won't start in warm temp if it is also in direct sunlight. during a good period I don't have trouble starting even if the engine is warm after driving.

only once did I have the engine stall while I was driving this is usually a startup problem
kd5hhx is offline   Quote
Old 05-25-2013, 02:49 PM   #2
AllMudd's Avatar
Join Date: Apr 2013
Location: SoCal
Posts: 1,610
AllMudd is on a distinguished road
That click you hear should be one of the relays disengaging in the fuse box under the hood. Try swapping he ign. Or fuel pump relay out with the horn relay. Give it a shot see what happens. Years back my ign relay would do this every time I hit a bump and it took me many many starts and bumps before I realized it.

AllMudd is offline   Quote
Old 05-25-2013, 03:32 PM   #3
Supporting Member

5-Year WF Supporting Member
jokerchief462's Avatar
Join Date: Apr 2012
Location: North Las Vegas
Posts: 10,091
jokerchief462 is on a distinguished road
Brain surgery on the ECU maybe???? Since it is temp sensitive it is a possibility the capacitors on the ECU may be going bad. Read this and see if your symptoms are mentioned here. Either way keep this handy.

Crash Course In Brain Surgery Replacing Capacitors On ECU -
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.

AF Jeep Club Tail Number 184
jokerchief462 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

All times are GMT -5. The time now is 11:13 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

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

Enter your email address:

Delivered by FeedBurner