2012 Wrangler JK won't start-thoughts? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 09-29-2012, 08:53 PM   #1
Jeeper
 
Join Date: Jun 2012
Posts: 22
2012 Wrangler JK won't start-thoughts?

I recently purchased my beautiful 2012 Saraha about a month ago.

Yesterday I ran my kid to school with no problems. About an hour later I started the Jeep but had difficulty as it had a very low unstable RPM idol of about 500 RPM which lasted a few seconds--then the engine died. I attempted to start it again...this time the starter would only crank, but no engine fire. After several attempts, I gave up and called Jeep.

Their recommendation was to start it in neutral and see how it went. I did and the same story happened (on a cold engine), but this time I think there was a faint smell of gas. The engine briefly cranked over and then quit.

By the time the tow truck arrived to tow the Jeep to the dealer the engine was fairly cold again. The tow truck driver attempted to start the engine. This time the engine turned over and continued running fine, however, we both smelled gas. Off to the dealer the Jeep went.

Today I received a call from Jeep. They cannot identify what is wrong at all. The engine starts fine, they smell no gas, diagnostics are fine....I asked them to keep the car and see if anything pops up, perhaps on cold start. Fortunately they agreed.

Could this be vapor lock? I have taken the Jeep off road twice, however, I haven't done any of the crazy stuff like my 19 year old son does! Any thoughts from anyone? The obvious thought was the fuel pump, but they are denying there is a problem.

I failed to say I only have 2800 miles on it!

Please help!!

Teemu is offline   Quote Quick Reply
Old 09-29-2012, 08:56 PM   #2
Supporting Member

WF Supporting Member
 
m998dna's Avatar
 
Join Date: Jan 2012
Posts: 2,417
Can you get vapor lock with fuel injection?

.

m998dna is online now   Quote Quick Reply
Old 09-29-2012, 08:58 PM   #3
Jeeper
 
Join Date: Jun 2012
Posts: 22
IDK. This was my husband's suggestion. I think it's when you get vapor/air in the gas line right? I failed to say I recently filled my gas tank and did have the oil changed at 2800 miles the day before.
Teemu is offline   Quote Quick Reply
Old 09-29-2012, 09:32 PM   #4
Jeeper

WF Supporting Member
 
sandbaja's Avatar
 
Join Date: May 2011
Location: San Diego, CA.
Posts: 938
Bad gas?
__________________
2012 JKU Rubicon -Natural green pearlcoat

Nvergiveup
sandbaja is offline   Quote Quick Reply
Old 09-29-2012, 10:58 PM   #5
Jeeper
 
Blastek's Avatar
 
Join Date: Mar 2012
Location: Portland, OR
Posts: 2,235
it sounds like it flooded itself. a sensor might be going bad or perhaps it had a hiccup. it might just be a one off thing. i would take it back and drive it until it happens again
__________________
2012 Deep Cherry Red JKU Sport S - Tickastar, 6 speed, 3.73, Dual Tops
Blastek is offline   Quote Quick Reply
Old 09-30-2012, 03:36 AM   #6
Supporting Member

WF Supporting Member
 
mcgee10's Avatar
 
Join Date: Jun 2012
Location: West Michigan
Posts: 807
I have posted this countless times. Find a gas station near you that sells gas with NO ethanol in it.
All window sticker on all new cars and truck the mpg is rated on 100% gasoline 0 ethanol. Most stations have 10% ethanol in there gas. Ethanol draws water.
I have a boat and snowmobile that will not run on gas with ethanol in it at all.
Here is a link to find a gas station in your state that sells gas with NO ethanol in it.
Ethanol-free gas stations in the U.S. and Canada Find your state at the bottom of page.
__________________
2012 Sport Auto 3.73
ACE rock sliders
Eaton Tru-trac Front and rear
17 inch ATX Ledge wheels
285/70/17 Duratrac
Cheap is never a good thing when it comes to your Jeep
mcgee10 is offline   Quote Quick Reply
Old 09-30-2012, 09:47 AM   #7
Supporting Member

WF Supporting Member
 
SilverSport's Avatar
 
Join Date: May 2011
Posts: 20,799
Send a message via Yahoo to SilverSport
And no ethanol free gas stations remotely close to me.

Ethanol forms a weak bond with gasoline. In the event water gets into the fuel tank, the ethanol easily breaks the bond with gasoline to bond with water. Not normally a problem with automobiles that get used on a daily basis. But if there is enough water in the tank or the vehicle sets for several days, the ethanol/water separates form the gas and settles to the bottom of the tank. This is called "phase separation". Then the ethanol/water mix gets pulled thru the fuel system to the engine.
__________________
"Own a Jeep and own a piece of history."

"The Hunter is not concerned with the opinion of the Wolf."
SilverSport is offline   Quote Quick Reply
Old 09-30-2012, 10:54 AM   #8
Jeeper
 
Join Date: Jun 2012
Posts: 22
Interesting....my son mentioned that and I did just fill up. Thanks for the advice!
Teemu is offline   Quote Quick Reply
Old 09-30-2012, 11:00 AM   #9
Jeeper
 
Join Date: Jun 2012
Posts: 22
Just realized I live in So Cal....my next trip where there's no ethanol will be next Easter break jet skiing in Lake Havasu! Clean air laws, ya know here

Teemu is offline   Quote Quick Reply
Reply

Tags
2012 jeep jk , 2012 wrangler , 2012 wrangler issues , 2012 wrangler unlimited

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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:43 AM.



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