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Old 04-12-2010, 06:17 PM   #1
D.C.W.J.
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Default Remote fuel filter under the hood

So the rest of nasioc is failing me and i cant seem to find what i am looking for.
My fuel filter o ring is shot so i figure i will just buy the wrx filter and install it under the hood.
The question i have is which fuel line to install it on.
A or B?


and do i just replace the little circular thing (technical i know) with the fuel filter?
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Old 04-12-2010, 06:58 PM   #2
Deuce Cam
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Quote:
Originally Posted by D.C.W.J. View Post
and do i just replace the little circular thing (technical i know) with the fuel filter?
I'm curious to know as well. The jdm GD sti's and older usdm wrx's that have the in-line filter don't appear to have the little circular thing on the line with the filter. My guess is you remove it.

Definitely report back on how it all works out. I plan to do this eventually.
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Old 04-12-2010, 07:00 PM   #3
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The circular thing is a fuel pulsation dampener. You want to leave that installed. Although, a fuel filter will go a long way to dampening the fuel pressure pulsation so perhaps you are OK removing the one on the line you install the filter.

Follow the lines. You want the filter on the line going into the rails. Follow the lines and find which one enters the driver's side rail and that's you line. The other one will lead to a fuel pressure regulator and from there to the ass end of the passenger side rail. That is NOT the line you want.
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Old 04-12-2010, 07:02 PM   #4
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Old 04-12-2010, 07:08 PM   #5
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It *looks* like the top line. I can never remember. I can check mine when I get home.

I *think* it's the bottom line out of the firewall and top into the intake manifold.
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Old 04-12-2010, 07:55 PM   #6
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You can remove the pulsation dampener and put the fuel filter in it's place. You might have to cut the fuel line so it doesn't kink. I'm pretty sure it's the top line into the rail. If you want to check, just remove the line and turn the key to the on position. If gas squirts out from the side closest to the firewall, that is the feed line.

***Be very careful doing this, the fuel will spray pretty far.***
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Old 04-12-2010, 08:03 PM   #7
ArronStump
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i think its A dallas
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Old 04-12-2010, 08:54 PM   #8
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I knew i could depend on SWIC, you guys are awesome.

So here is what my original fuel filter looked like, as you can see the o-ring stretched out and was no longer sealing. I could blow air into one end while plugging the other side and air would flow out of the middle where the plastic and metal meet.


So instead of buying a new filter like this style and worrying about it again i decided to install the 02-03 wrx filter.
I bought more fuel line to replace the filter in the assembly in the tank.

I installed a walbro while i was at it.
Finally i was to the point where i needed to install the new fuel filter. I removed the fuel damper and the bracket that attaches to the damper.
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Old 04-12-2010, 10:35 PM   #9
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Nice

1. Did you get the bracket/mount for the fuel filter or is it just hanging by the lines?

2. Did you have to trim the fuel lines at all or was it plug n play?
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Old 04-13-2010, 12:19 AM   #10
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I bypassed the OEM fuel filter and replaced it with an inline unit from Autozone. I had no problems with it and gained peace of mind. I sold my car, so I can't remember which line it was for sure. I could have sworn that the dampner was on the return line though.
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Old 04-13-2010, 01:55 AM   #11
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Quote:
Originally Posted by Deuce Cam View Post
Nice

1. Did you get the bracket/mount for the fuel filter or is it just hanging by the lines?

2. Did you have to trim the fuel lines at all or was it plug n play?
I didn't know about a bracket for the fuel filter. The bracket I removed was split in 2, a lower and upper mount. Right now the filter is sitting on the lower bracket. I still need to go in and add some cushion around it so it does not vibrate a hole in the bottom of it.

The fuel lines were perfect length which made me happy that i didn't have to do any trimming.
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Old 04-13-2010, 02:46 AM   #12
Deuce Cam
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^There's an oem metal bracket that you don't already have that you need. (You basically need one from a 02-03 wrx, not sure if the 04's have these.) I'm pretty sure they're cheap. It mounts to the same spot as the bracket visibile in the pick on the lower right side of the filter. The filter just slides into the bracket. I think there's also a thin piece of rubber or plastic that slides in between the filter and bracket to help hold the filter in place and dampen vibrations. I'm not sure if it comes with the bracket or if it's a separate part. The Subaru parts guy should know.
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Old 04-13-2010, 07:57 AM   #13
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I tried using the OEM fuel filter bracket from the 02-mid 05 wrx. You will need to modify the bracket a fair amount and even then it doesn't place the filter in the best spot. If you go this route, you will need to modify the fuel lines to lengthen them.

OP, I like your method better. And yes, line A was correct.

and holy clean engine bay!
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Old 04-13-2010, 07:23 PM   #14
Deuce Cam
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^^Did you remove the air pump prior to installing it? (2006 wrx's have an air pump in that location I think.) Please clarify - that could definitely be an issue if you didn't. The 2006 STI's don't have an air pump fwiw.

Still, the oem bracket might slightly move the filter in a different spot than the op pictured (not sure) so it's possible that the fuel lines may need to be modified if going that route.
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Old 04-13-2010, 09:54 PM   #15
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Quote:
Originally Posted by Deuce Cam View Post
^^Did you remove the air pump prior to installing it? (2006 wrx's have an air pump in that location I think.) Please clarify - that could definitely be an issue if you didn't. The 2006 STI's don't have an air pump fwiw.

Still, the oem bracket might slightly move the filter in a different spot than the op pictured (not sure) so it's possible that the fuel lines may need to be modified if going that route.
Sorry, this is critical.

You DO NEED to remove the air pump. There will be some major clearance issues if you don't. My whole air system was messed up and removed long ago, so it didn't even occur to me when I went after the fuel filter.

And I'm fairly certain all STi's and WRX's after 2005 (MY2006 and up) have the air pump. The location has changed over the years, but it's there.
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Old 04-13-2010, 10:03 PM   #16
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I didn't think the 06 STI had an air pump? I thought 06+ WRX and 07+ STI had the air pump.

Last edited by brocksdad; 04-13-2010 at 10:09 PM.
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Old 04-14-2010, 01:18 AM   #17
kpluiten
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Agreed with Mark ^
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Old 04-14-2010, 02:38 AM   #18
Deuce Cam
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Originally Posted by fast06wrxtr View Post
Sorry, this is critical.

You DO NEED to remove the air pump. There will be some major clearance issues if you don't. My whole air system was messed up and removed long ago, so it didn't even occur to me when I went after the fuel filter.

And I'm fairly certain all STi's and WRX's after 2005 (MY2006 and up) have the air pump. The location has changed over the years, but it's there.
Oh ok bummer, I was hoping that was the hiccup. In my head I don't see why the fuel filter bracket would be problem (off the top of my head you may have to ditch the bracket holding the battery cables to make it work - it's pretty much worthless anyway). I'll have to find an engine bay pic of a wrx with the in-line filter to see. SaabaruMike mentioned above that he didn't have any trouble with the setup; however, he probably wasn't referring to the install, plus I don't even know if he used that bracket. Hopefully he can shed some light for us.

07+ sti's and 06+ wrx's have the airpump; they changed the location of the pump on all 08+ imprezas.
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