Originally Posted by robispec (Post 964624)

I was lucky as I have many friends in the tc community they hit the problem FIRST TRY.. seems their intank filter does the same on their e-85 boosted cars too... I'm ASSUMING regular gasoline with ocasional e-85 uses will prevent this ...No Dangit I wont go there... ALL alcohols are SOLVENTS too...and they work particularly well on adhesives....like the kind glueing the felt material to the filter pleats...so with Murphy in mine if it can fail it will...and at the worst possible time.
We
Cleaned the tank and all feed and return lines
Replaced the intank pump
Replaced the port injectors
Replaced Direct injection pump
Replaced/cleaned all DI hardlines
Replaced the direct injectors
We did this from the tank forward in sequence to try and isolate the restrictions.
Car did not run clean till EVERYTHING had been serviced/replaced/cleaned..
ALL E-85 users I would LOOK at your intank sump bowl. ANY DEBRIS means your return fillter is disintegrating...

Originally Posted by robispec (Post 964722)

but it is cycling fuel through the sump side tank to pull fuel to the surge sump..I wouldn't call that returnless...all fuel pulled from the sump is passed through this filter before entering the sump the fuel pump sits in.

sump picture
http://i240.photobucket.com/albums/f...psdbddbd78.jpg
debris from di pump and hardlines
http://i240.photobucket.com/albums/f...psa5b266af.jpg
the offending part
http://i240.photobucket.com/albums/f...psa34c9944.jpg
Where it is located NOTE it surrounds the fuel pump.
http://i240.photobucket.com/albums/f...ps617ec75f.jpg

YES I TAKE CRAPPY PICTURES...

Originally Posted by Don@Accelerated (Post 965413)

So what exactly had you prematurely cutting the filter open. Maybe I missed the initial problem.

For the sake of argument I went and cut my factory filter housing up. I have 4k+ only E85 Miles basically. I have no signs of any degredation to the filter. Now it is true that over time the paper gasket will now allow heavy enough flow for the E85. I haven't run into that scenario yet. It can't be a sitting issue either because mine sat the entire winter here. I wasn't able to put many miles on it.

Have you been/or ever have used an octane booster in the car? Fuel Supplement Additive? It looks crystaline in that picture. E85 is not going to cause that.

I have pictures of my filter and it looks nothing like yours, and doesn't show the slightest sign of any issues yet. My car sat all winter with

Lets discuss further

http://i1128.photobucket.com/albums/...psae1f1868.jpg

http://i1128.photobucket.com/albums/...psa6b14a28.jpg

http://i1128.photobucket.com/albums/...ps78fb402b.jpg

http://i1128.photobucket.com/albums/...ps707f8c30.jpg

Originally Posted by xjohnx (Post 964684)

Isn't the BRZ's stock fuel system a returnless system (just going by this thread: http://www.ft86club.com/forums/showthread.php?t=36231 )?

if so, would we even have a return filter?

Originally Posted by Sportsguy83 (Post 964693)

I think Robi just called it that, but we do have a filter in tank for sure, sits right below the FP. And yes, our stock fuel system is returnless.

Originally Posted by xjohnx (Post 964710)

Right, but the filter they're talking about disintegrating is the return line filter, no?

Originally Posted by SkullWorks (Post 964712)

Wouldn't it be better to wait for the thread Robi already promised...He has much more info to share I am sure, and at this rate his first response will be on page 3 and effectively lost....

Originally Posted by AVOturboworld (Post 964724)

I haven't personally taken apart the BRZ/FR-S fuel pump assembly, but I have taken apart the fuel pump assemblies for the newer Subaru's. The BRZ fuel pump assembly looks similar to that design (but not exactly the same), and if so, the portion of that assembly that the fuel pump clips into also has a filter on the inside. That may be what they are referencing as coming apart, as it's likely a different material than the "sock" that the fuel pump is pulling fuel through.

Ok, Robispec already beat me to it.