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Unread 03-21-2014, 06:48 PM   #1
LibertyRS
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2012 KK Liberty 
 
Join Date: Dec 2011
Location: Birmingham, MI
Posts: 274
Hello fellows,

So for the past couple weeks my engine light as well as my gas cap loose indicator has been on. I'm running the Jet stage 2 chip and putting 91/93 in Libby so she runs how the chip is made too. And yes I've tighten down my gas cap. When I ran a OBD2 scanner the code came back an emission leak. I know it has to do something with all the valves and gizmos of the gas tank but I am wondering if anyone else has experienced anything similar.

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Unread 03-21-2014, 07:25 PM   #2
lfhoward
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2008 KK Liberty 
 
Join Date: Nov 2012
Location: Ann Arbor, MI
Posts: 467
It is possible for your gas cap to be broken but not appear to be broken, even when tightened down several clicks. I had this happen on my last vehicle, and it got so bad I could even smell gas when idling. The dealer did a smoke test of the whole fuel/emissions system and found nothing. It was the gas cap all along. You can get a new one for something like $15, and see if that clears it up. If so, it would be a cheap fix.
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Unread 03-21-2014, 09:20 PM   #3
Gageraid
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Join Date: May 2012
Location: Branchburg, New Jersey
Posts: 1,309
I agree with Lauren. Also check the hoses from the evap canister.
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Unread 03-23-2014, 03:04 AM   #4
josworth
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2010 KK Liberty 
 
Join Date: Oct 2013
Location: Akron, Ohio (OH)
Posts: 238
Yes, check the gas cap. Many garages now have pressure testers for them. Basically the same thing the emissions testing place has. If you live in an emissions testing state you probably have seen one. Here in Ohio they basically plug in to your OBD port and put a tester on your gas cap. If it passes those two things, no further testing and off you go..

If it isn't that, then you need to start checking the evap system...
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Unread 03-30-2014, 08:00 PM   #5
LibertyRS
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2012 KK Liberty 
 
Join Date: Dec 2011
Location: Birmingham, MI
Posts: 274
Randomly went away now...so its fixed...
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