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Old 05-14-2019, 10:08 PM   #1
Atomic Wrx
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Default Evap leak?

So background i have a 2018 wrx with 8,000 miles.
So I recently changed my fuel pump, did TGV Deletes and egr deletes and got a new tune. Now all a sudden after one day of driving i have a code p0455, p0441. Evap leak. Before i had no problems with a evap leak and now problem i know its not a bad gas cap, but could it actually be a evap. The car holds fuel pressure and its still practically brand new. I dont see how there could be a evap leak. I never touched any of those lines. And my tuner who is very reputable said theres nothing on his end. Any help guys?
Also to add car idols at 71.8% duty cycle and is only at 400pressuere i think that i maybe did a poor job of an install?
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Last edited by Atomic Wrx; 05-15-2019 at 09:47 AM.
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Old 05-14-2019, 11:39 PM   #2
dpetro1
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Did you maybe disconnect the vacuum pump line to unbolt the intake manifold on the passenger side? Or any other vacuum lines?

Last edited by dpetro1; 05-14-2019 at 11:48 PM.
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Old 05-15-2019, 08:35 AM   #3
Atomic Wrx
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Quote:
Originally Posted by dpetro1 View Post
Did you maybe disconnect the vacuum pump line to unbolt the intake manifold on the passenger side? Or any other vacuum lines?
We didn't on purpose but maybe when we were pulling it out we snagged one.
Just found this hoes completely detached

Last edited by Atomic Wrx; 05-15-2019 at 11:28 AM.
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Old 05-15-2019, 09:53 AM   #4
Atomic Wrx
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update
Today my charge pipe to inter cooler coupler was found broken. So i think its been causing a leak which has been causing my fuel pump to be off cycle which might have caused the evap system to detect a leak. since the evap system checks for leak by taking a vacuum and measuring for lost pressure and if the system its taking the vacuum from (ie the intake manifold) is already loosing pressure its causing the rest of the system to act up.
Im no expert, im just spitballing ideas to see if anyone els knows the real problem
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Old 05-15-2019, 01:29 PM   #5
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Certainly a good place to start. Technically the charge pipes and couplers don't see vacuum since they are before the tb but it's a leak none the less.
Replace coupler, reset ecu and go from there.
Keep an eye on the accessport for any unusual values in af ratio, correction, boost/vac etc
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Old 05-15-2019, 01:45 PM   #6
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What fuel pump did you put in it, and why?
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Old 05-15-2019, 02:24 PM   #7
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Since you changed the fuel pump, it's possible the gasket on the tank got damaged or didn't seat correctly. That would also cause an evap code because the tank wouldn't be able to pressurize.
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Old 05-15-2019, 02:39 PM   #8
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What fuel pump did you put in it, and why?
The dw300c to get ready for flex fuel
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Old 05-15-2019, 02:39 PM   #9
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Originally Posted by Mulder View Post
Since you changed the fuel pump, it's possible the gasket on the tank got damaged or didn't seat correctly. That would also cause an evap code because the tank wouldn't be able to pressurize.
Thats what some of my friends thought I ordered one to see if it works, would a evap mess with the fuel pump duty though
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Old 05-15-2019, 02:41 PM   #10
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Quote:
Originally Posted by dpetro1 View Post
Certainly a good place to start. Technically the charge pipes and couplers don't see vacuum since they are before the tb but it's a leak none the less.
Replace coupler, reset ecu and go from there.
Keep an eye on the accessport for any unusual values in af ratio, correction, boost/vac etc
I fixed the clamp still there but at least somthings gone but i found a disconnected hose maybe got loose when i was doing tgv
https://imgur.com/gallery/SzcvcZQ
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Old 05-15-2019, 02:48 PM   #11
Atomic Wrx
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Quote:
Originally Posted by dpetro1 View Post
Did you maybe disconnect the vacuum pump line to unbolt the intake manifold on the passenger side? Or any other vacuum lines?
Is this it
https://imgur.com/gallery/SzcvcZQ
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Old 05-15-2019, 02:50 PM   #12
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I can't really tell which hose you Are referencing. I don't see anything disconnected
Can you circle or point to which one you mean?
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Old 05-15-2019, 02:56 PM   #13
Atomic Wrx
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Quote:
Originally Posted by dpetro1 View Post
I can't really tell which hose you Are referencing. I don't see anything disconnected
Can you circle or point to which one you mean?
I reconnected the hose sorry heres a new link one picture is zoomed out. Its on the drivers side.
https://imgur.com/gallery/hJ63ZtY
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Old 05-15-2019, 06:11 PM   #14
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The hose dead center with no clamp runs to the fuel tank vent so that makes sense.
Now that it's reconnected, reset your codes and you should be good.
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Old 05-15-2019, 10:33 PM   #15
Atomic Wrx
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Quote:
Originally Posted by dpetro1 View Post
The hose dead center with no clamp runs to the fuel tank vent so that makes sense.
Now that it's reconnected, reset your codes and you should be good.
I think that fixed it, knock on wood, cleared the codes and nothings come back in my 30 minute drive. While early when I cleared it it came back in 10 minutes later. Thanks so much
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