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08-15-2010, 10:40 PM | #1 |
Scooby Newbie
Member#: 224069
Join Date: Sep 2009
Chapter/Region:
MAIC
Location: Frederick, MD
Vehicle:2003 wrx blue |
boost backoff in 4th gear and cel code P0457
I have been getting the cel code P0457 which means evaporative emissions leak (loose fuel cap) for a few months now. I bought a oem subaru gas cap to solve the problem, but i still get the cel. I have read on nasioc about the cel code, and found possible problems could be the ecu needing reprogrammed or loose hoses?
I also just noticed today, i get full boost, but in 4th gear my boost backs off .05 mpa. My thought is maybe i need to reflash stage 2? I have a 2003 wrx with a catless up-pipe and tbe and an ebay turbo inlet.
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08-16-2010, 12:53 PM | #2 |
Sammo Hung
Moderator Member#: 10613
Join Date: Sep 2001
Chapter/Region:
South East
Location: N Fla / S Ga
Vehicle:2002 USDM WRX WRB |
you need to look around the front of intake right by inlet hose,
behind power steering pump & alternator. check for loose hoses.. |
08-16-2010, 12:56 PM | #3 |
Scooby Newbie
Member#: 224069
Join Date: Sep 2009
Chapter/Region:
MAIC
Location: Frederick, MD
Vehicle:2003 wrx blue |
just checked that before you wrote. I checked the evap solenoid and the t-piece that is known for this problem. They were both tight.
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08-16-2010, 02:32 PM | #4 |
Sammo Hung
Moderator Member#: 10613
Join Date: Sep 2001
Chapter/Region:
South East
Location: N Fla / S Ga
Vehicle:2002 USDM WRX WRB |
also check charcole canister under gas filler door.
you can see it from under the car..rear bumper |
08-16-2010, 02:34 PM | #5 |
Scooby Newbie
Member#: 224069
Join Date: Sep 2009
Chapter/Region:
MAIC
Location: Frederick, MD
Vehicle:2003 wrx blue |
checked that after i wrote on here. Everything looks good but there is one nozzle that appears to be missing a hose.
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08-16-2010, 02:43 PM | #6 |
Scooby Guru
Member#: 70395
Join Date: Sep 2004
Chapter/Region:
MAIC
Location: Da-boonies,Va
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..............and that would be the problem. No map disables the P0457 code unless you are deleting the evap system and that would be a custom tune.
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08-16-2010, 03:27 PM | #7 |
Scooby Newbie
Member#: 224069
Join Date: Sep 2009
Chapter/Region:
MAIC
Location: Frederick, MD
Vehicle:2003 wrx blue |
So should i have a cap on that nozzle or where is it supposed to be connected?
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08-16-2010, 09:56 PM | #8 |
Scooby Specialist
Member#: 80465
Join Date: Jan 2005
Chapter/Region:
RMIC
Location: Denver
Vehicle:2001 2.5RS Black Diamond Pearl |
remove the charcoal canister and have a look around. It's not supposed to be capped.
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08-16-2010, 09:59 PM | #9 |
Scooby Newbie
Member#: 224069
Join Date: Sep 2009
Chapter/Region:
MAIC
Location: Frederick, MD
Vehicle:2003 wrx blue |
Edit, problem solved. Missing nipple has loose hose right next to it
Last edited by yamaha_rider619; 08-17-2010 at 11:33 AM. Reason: problem solved |
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