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Unread 03-18-2012, 09:07 PM   #1
JasonStebbins
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1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
P0455 Solved

For anyone that has the CEL code P0455 (Large fuel vapor leak in the evap system) I fixed mine today since my inspection is up at the end of March. I figured I would post my fix to help out someone else. I've had this problem for several months.

I started with the gas cap since that was the general consensus on here. No dice. Then I replaced the charcoal canister and purge solenoid, still leaking. Then I traced every hose that I could see from the large canister under the bumper cover all the way back to the gas tank. Still could not find a cracked/dry rotted hose

So today I finally broke down and got a smoke test. Turned out to be the steel evap line right above the driver side wheel well. It's down in the crevasse under the hood hinge, where it started to rust through and mud/debris had got in there and the line had snapped right in half. Put six inches of rubber hose on with a couple hose clamps and problem solved. The computer found no faults and inspection was a success.

Hopefully this will help someone in the future

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Unread 03-18-2012, 10:34 PM   #2
Howieb92
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1998 ZJ 
 
Join Date: Feb 2011
Location: Grand Forks, ND
Posts: 414
Ill have to check that next time I'm in the shop. Because I got that same leak any noticeable difference in power economy or anything after that?
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Unread 03-19-2012, 07:48 PM   #3
JasonStebbins
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1997 ZJ 
 
Join Date: Jan 2009
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Just fixed it yesterday and filled up the tank, I'll let you know if I get a difference in mileage. One thing that went away was the charcoal canister doesn't tick so loud anymore.
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Unread 03-19-2012, 08:30 PM   #4
Howieb92
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1998 ZJ 
 
Join Date: Feb 2011
Location: Grand Forks, ND
Posts: 414
Did you have to remove the fender liner to see the line?
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Unread 03-19-2012, 09:35 PM   #5
JasonStebbins
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1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Nope, it's right behind the brake booster. Down in there above the wheel well.
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Unread 03-19-2012, 10:24 PM   #6
theblackjack69
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1998 ZJ 
 
Join Date: Dec 2011
Location: East Northport, NY
Posts: 162
Mine happened after I dropped the tank, totally my fault because the O ring was folded under the fuel pump. But for anybody who dropped their tank and got this, re drop and do it all again and you will most likely fix your problem.
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Unread 06-25-2013, 06:35 PM   #7
freedom0226
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1997 ZJ 
 
Join Date: Jun 2013
Location: la mirada, ca
Posts: 42
Results ?

Quote:
Originally Posted by JasonStebbins View Post
Just fixed it yesterday and filled up the tank, I'll let you know if I get a difference in mileage. One thing that went away was the charcoal canister doesn't tick so loud anymore.
so what was the conclusion on mpg after the fix. i am just reading this and i will try to find that line in the am. i am having the same issue.
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Unread 06-25-2013, 06:44 PM   #8
ZeeJay1997
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1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,739
There's also a rubber splice under the washer fluid reservoir will rot and cause a leak. Changed mine out when I replaced the manifold.
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