JK Sometimes wont start. - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-11-2016, 01:24 PM
Thread Starter
flashmavi's Avatar
Join Date: Oct 2016
Location: Bolivia
Posts: 52
JK Sometimes wont start.

So sometimes i have an issue starting my JK and im still looking for a good mechanic who doesn't just guess and switches everything out randomly.

From time to time i just get ONE click - feels like a quarter rotation. Usually it works if i try a couple of times, but its a bit annoying if im at the gas station and there are people waiting behind me.

The starter has NEVER clicked multiple times and the ending NEVER started slow. Its either one click to it starts perfectly. Im not sure if im right about this, but can i rule out a starter issue because there are never multiple clicks and can i rule out the fuel pump because it never starts slow.

I suspect the cables and plugs, maybe even the chip in the key? Is it possible the the ignition is bad.

ALSO... DONT have to open the hood and move things or plugs around. I really just try a few times and thats it.

flashmavi is offline   Quote
Old 12-11-2016, 03:06 PM   #2
Jkuone's Avatar
Join Date: Dec 2013
Location: Colorado
Posts: 907
Have you tested battery? , checked all grounds?

2013 JKU , JKS 3 1/2" lift, Poison Spyder/ Expedition one bumpers| chromoly axle shafts|
Currie Adj control arms| EVO Sliders| Fuel Wheels/ 37" STT Pros, G2 5:13 Gears, ARB locker rear/ G2 Front axle, ARB Locker, RCV Shafts,Warn Winch| Rockhard skids , synergy tie rod, drag link | Trail Ready Limiting Straps | Currie Antirock front, WTO Hydro Assist Steering, poison spyder fenders, Hyline front fender liners, Fox 2.0 Res Shocks,
Jkuone is offline   Quote
Old 12-11-2016, 04:05 PM   #3
RubiconOp's Avatar
Join Date: Dec 2014
Posts: 593
Do you have a winch connected? I have a Warn M8000 and I had to disconnect it, easy to reconnect FYI... and problem solved.
2014 JKR
RubiconOp is offline   Quote
Sponsored Links
Old 12-11-2016, 04:36 PM   #4
JKU Jay's Avatar
Join Date: Aug 2012
Location: RTP, NC (Raleigh)
Posts: 6
Be sure your battery is good first but...I had a similar problem and was solving it by jiggling the shifter (auto) and it would start after that. I eventually read on another forum about adding a 4ft 10 gauge ground cable from the neg clamp on the battery to the bolt on the top of the alternator. Has only happened once in the 4 months since I made that 10 min update. You could also check the existing ground straps off that neg post are all connected well and not corroded.
JKU Jay is offline   Quote
Old 12-14-2016, 11:42 AM   #5
Join Date: Aug 2016
Posts: 1
The problem is most likely grounding. I had a similar issue. Added a 6 gauge wire from neg post of battery to alternator bracket and problem was gone.
Bugvert is offline   Quote
Old 12-14-2016, 02:33 PM   #6
JTPhoto JK's Avatar
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,121
LOL i added a 4gauge ground wire, neg terminal to Alternator Bracket..
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is offline   Quote
Old 12-14-2016, 02:56 PM   #7
Join Date: Aug 2012
Posts: 11
Had issue with 2015 Unlimited less than a year after purchased new. Jeep would start and run fine then go completely dead next time I tried to start. Had it towed to dealer three times where they would change out a module and it would start and work fine. I would get it back and within an day or two the same thing would happen. Jeep engineering was consulted and they always went back to the module. But after changing it twice with the same results the lead Mech and the dealer dug in under the dash and found a wire bundle to the module miss routed and a chaffed wire. After he fixed the wire and correctly routed the bundle I have had no issues for an entire year.
ozglide is offline   Quote
Old 12-14-2016, 08:50 PM   #8
Join Date: Nov 2015
Location: Keller, Texas
Posts: 135
I would definitely check both battery terminals to make sure they are tight before going any further. Then suspect a possible grounding issue.

codyzx7 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 10:01 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeep, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.