Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > FA Series Factory 2.0L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 08-07-2015, 12:34 PM   #51
Bryan82
Scooby Newbie
 
Member#: 346731
Join Date: Feb 2013
Chapter/Region: MAIC
Location: Newport News
Vehicle:
2015 WRX
Ice Silver

Default

Compression test while you're in there then. If that's good, guess I would suspect gummed up injector.
* Registered users of the site do not see these ads.
Bryan82 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-08-2015, 07:52 PM   #52
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default

#Sabo1886 What symptoms did your pump have when it started to go?
2015WRX is offline   Reply With Quote
Old 08-08-2015, 07:53 PM   #53
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default

Quote:
Originally Posted by Sabo1886 View Post
Hi guys, I'm on my second HPFP using E85 and I know many of you have had pump failures do to lack of lubrication of factory pump and a 30% increase of pump. Does anyone know if any manufacture is working on making an E85 compatible high pressure fuel pump? I was one of the first E85 WRX back in June of 2014 and two pumps in one year total. If anyone has any solutions please let me know!

#Sabo1886 What symptoms did your pump have when it started to go?
2015WRX is offline   Reply With Quote
Old 08-12-2015, 07:00 AM   #54
Nisstrust
Scooby Newbie
 
Member#: 255202
Join Date: Aug 2010
Chapter/Region: International
Default

Any help with an adjustable fuel pressure regulator for those maxing the hpfp side of the fuel equation?
Nisstrust is offline   Reply With Quote
Old 08-13-2015, 01:02 AM   #55
arghx7
Scooby Specialist
 
Member#: 232940
Join Date: Dec 2009
Location: cold
Default

Quote:
Originally Posted by Nisstrust View Post
Any help with an adjustable fuel pressure regulator for those maxing the hpfp side of the fuel equation?
It sounds like you are thinking about a port fuel injection system with the normal 4-6 bar fuel pressure. Direct injection high pressure fuel pumps have an adjustable fuel pressure regulator built into them (the spill valve or whatever term you want to use). The ECU controls that.
arghx7 is offline   Reply With Quote
Old 08-13-2015, 01:21 PM   #56
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default E85 DI high pressure fuel pump

Quote:
Originally Posted by Bryan82 View Post
Have you pulled the plug to look at it?

Problems solved. Had zero to due with e85. Apparently when you install your TGV's there isn't supposed to be wires pinched fix wasn't cheap with labor but it's all good now.

Last edited by 2015WRX; 08-13-2015 at 11:31 PM.
2015WRX is offline   Reply With Quote
Old 10-03-2015, 10:41 PM   #57
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default

Bump for any more info on this important info. I keep hearing that Clark's cars aren't having problems. I'm wondering if he was able to figure oh the tuning parameters while others are struggling. I'm still having partial surging at times. Pressure rockets up over 2500psi and then the pump goes crazy. About to throw in the towel on E.
2015WRX is offline   Reply With Quote
Old 10-04-2015, 11:08 AM   #58
anjuna
Scooby Specialist
 
Member#: 401977
Join Date: Sep 2014
Chapter/Region: TXIC
Location: Houston
Vehicle:
IDFK Wat
bish whet

Default

Quote:
Originally Posted by 2015WRX View Post
Bump for any more info on this important info. I keep hearing that Clark's cars aren't having problems. I'm wondering if he was able to figure oh the tuning parameters while others are struggling. I'm still having partial surging at times. Pressure rockets up over 2500psi and then the pump goes crazy. About to throw in the towel on E.
Are you using the fuel lubricant?
anjuna is offline   Reply With Quote
Old 10-04-2015, 12:02 PM   #59
WRXINTX
Scooby Specialist
 
Member#: 96712
Join Date: Sep 2005
Default

Has anyone contacted APR (huge vw high performance parts supplier) about upgrade parts for the Subaru DIT pump?

APR has a good rep in the VW community and they sell upgraded pumps and kits for all kinds of HPFP.
WRXINTX is offline   Reply With Quote
Old 10-04-2015, 09:58 PM   #60
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default E85 DI high pressure fuel pump

Quote:
Originally Posted by anjuna View Post
Are you using the fuel lubricant?

Yes, Lucas ethanol treatment. My suspicions are content related. It's tested on a few occasions around E90. I'm debating if a E50 or 30 mix would be easier on the pump internals. From my understanding the system would not need to worry about increases in demand, yet offer the knock abilities of E.
2015WRX is offline   Reply With Quote
Old 10-04-2015, 10:00 PM   #61
anjuna
Scooby Specialist
 
Member#: 401977
Join Date: Sep 2014
Chapter/Region: TXIC
Location: Houston
Vehicle:
IDFK Wat
bish whet

Default

Oh see I'm not using the e treatment one. I'm using the one that specifically says conditioner and fuel lubricant. It's cheaper, thicker, and I haven't had issues.
anjuna is offline   Reply With Quote
Old 10-04-2015, 11:16 PM   #62
Harey
Scooby Specialist
 
Member#: 270569
Join Date: Jan 2011
Chapter/Region: International
Vehicle:
'15 Foz XT & GT86

Default

Quote:
Originally Posted by 2015WRX View Post
Yes, Lucas ethanol treatment. My suspicions are content related. It's tested on a few occasions around E90. I'm debating if a E50 or 30 mix would be easier on the pump internals. From my understanding the system would not need to worry about increases in demand, yet offer the knock abilities of E.
Yes obviously the less % of ethanol in the fuel the less amount of fuel that is required.

Anything over ~E35 will give you the same power/knock benefits. Above that is really just whatever is easier. E42.5 seems pretty popular as you add even amounts of 93 and E85 each time you fill up.
Harey is offline   Reply With Quote
Old 02-18-2016, 06:54 PM   #63
outbackwrxxx
Scooby Newbie
 
Member#: 378862
Join Date: Jan 2014
Location: Long Island NY
Vehicle:
2015 WRX
Ice silver

Default

Sorry to revive an old thread but what are the symptoms of a failing HPFP? my car is bucking real bad when cruising and fuel pressure is dropping below 40psi. no knock at all, everything else looks fine. Dealer isn't helping this time so im on my own :/
outbackwrxxx is offline   Reply With Quote
Old 02-18-2016, 06:58 PM   #64
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default

If you haven't run pump gas thru it in a while do so. What is your high pressure actual reading? You can compare that to the target. I had many issues on full E. A blend is best if you ask me. 50 percent worked flawlessly.
2015WRX is offline   Reply With Quote
Old 02-18-2016, 07:00 PM   #65
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default

If the pump gas doesn't fix it you'll likely need a new HPFP. If your falling to 40psi your not HPFP is fried. My car had a couple of episodes but cleared up after some tune adjustments.
2015WRX is offline   Reply With Quote
Old 02-18-2016, 07:13 PM   #66
outbackwrxxx
Scooby Newbie
 
Member#: 378862
Join Date: Jan 2014
Location: Long Island NY
Vehicle:
2015 WRX
Ice silver

Default

Quote:
Originally Posted by 2015WRX View Post
If the pump gas doesn't fix it you'll likely need a new HPFP. If your falling to 40psi your not HPFP is fried. My car had a couple of episodes but cleared up after some tune adjustments.
ive been running e85 for close to 10,000 miles without running ANY 93. i will definitely fill up with 93 when im empty.
outbackwrxxx is offline   Reply With Quote
Old 02-18-2016, 10:21 PM   #67
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default

Get that fuel out of there asap. Some guy had a similar problem on the forums. That's far to long to run E in the car. It's better to cycle gas thru at least every 5 tanks or so. E is an excellent fuel but some fuel starts to gum up. This isn't a new issue with E and DIT cars. Better to play it safe.
2015WRX is offline   Reply With Quote
Old 02-18-2016, 10:44 PM   #68
boxterWRX
Scooby Newbie
 
Member#: 416278
Join Date: Mar 2015
Default

I ran 8k then had problems on a clark tune it's a dw65 too so your saying if I run back to e85 I should be good again just cycle?
boxterWRX is offline   Reply With Quote
Old 02-19-2016, 04:04 AM   #69
jerryscherry
Scooby Newbie
 
Member#: 381213
Join Date: Feb 2014
Chapter/Region: SCIC
Location: Southern California
Vehicle:
2015 WRX - BASE -CWP
Crystal White Pearl

Default

darn i was so set on the e85 route. didn't know full e85 caused problems with the pumps.
jerryscherry is offline   Reply With Quote
Old 02-19-2016, 10:19 AM   #70
2015WRX
Scooby Newbie
 
Member#: 389290
Join Date: Apr 2014
Chapter/Region: MWSOC
Location: Lake in the hills, IL
Vehicle:
2005 WRX STi
Black

Default

If you run E85 to long it can cause a sticky substance on the injectors and fuel pump. This is a common problem running ethanol for some reason. There are theories out there about why it's happening but it's prevalent in the mazdaspeed3 community.
2015WRX is offline   Reply With Quote
Old 02-19-2016, 01:28 PM   #71
arghx7
Scooby Specialist
 
Member#: 232940
Join Date: Dec 2009
Location: cold
Default

Saab did a study on E85 deposits back in the day, as they were leaders in flex fuel during the mid 2000s. Basically you have to cycle regular E0/E10 in there after a while to clear the crap up. There isn't any other way to get rid of it.
arghx7 is offline   Reply With Quote
Old 02-19-2016, 02:07 PM   #72
jerryscherry
Scooby Newbie
 
Member#: 381213
Join Date: Feb 2014
Chapter/Region: SCIC
Location: Southern California
Vehicle:
2015 WRX - BASE -CWP
Crystal White Pearl

Default

Quote:
Originally Posted by 2015WRX View Post
If you run E85 to long it can cause a sticky substance on the injectors and fuel pump. This is a common problem running ethanol for some reason. There are theories out there about why it's happening but it's prevalent in the mazdaspeed3 community.
Quote:
Originally Posted by arghx7 View Post
Saab did a study on E85 deposits back in the day, as they were leaders in flex fuel during the mid 2000s. Basically you have to cycle regular E0/E10 in there after a while to clear the crap up. There isn't any other way to get rid of it.
so basically gotta cycle some 91 in there once in a while. I plan to get cobb's flex fuel kit for the 15+wrx when it comes out, although im concerned about the HPFP seizing up after reading through this thread.
jerryscherry is offline   Reply With Quote
Old 02-21-2016, 12:19 PM   #73
ManuelG
Scooby Newbie
 
Member#: 401785
Join Date: Sep 2014
Chapter/Region: MWSOC
Location: Sterling Heights, Michigan
Vehicle:
2015 WRX w/2JZ
WRB

Default

Is anyone on Clark's tune having any problems? Seems like no one who's tuned by Clark is. I've been running straight E85 with the Lucas conditioner for 14,000 miles with no problems on his tune.
ManuelG is offline   Reply With Quote
Old 02-21-2016, 01:33 PM   #74
boxterWRX
Scooby Newbie
 
Member#: 416278
Join Date: Mar 2015
Default

I was on a clark tune but I'm also Catless fmic and cai so that might be a factor I used Lucas ethanol treatment on every tank lasted about 8k gonna try the switch back
boxterWRX is offline   Reply With Quote
Old 03-09-2016, 12:14 PM   #75
outbackwrxxx
Scooby Newbie
 
Member#: 378862
Join Date: Jan 2014
Location: Long Island NY
Vehicle:
2015 WRX
Ice silver

Default

Turns out my fuel pump sock got blown off somehow
all is well now. I took your advice and refilled with a full tank of 93 to just clean everything out. How to i go about switching back to e85? Would it be ok to run it low, fillup with e85 then let it idle on the 93 map to pump out fuel in the lines? or is it a must that i manually drain the tank fully?
outbackwrxxx is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 02:20 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.