Welcome to the North American Subaru Impreza Owners Club Friday August 1, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.5L 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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 09-28-2013, 07:56 PM   #1
Bleichroeder
Scooby Newbie
 
Member#: 365470
Join Date: Aug 2013
Default Signs of dying fuel pump?

Quick question, sometimes when I start the car, if I don't let the pump prime for more than 4/5 seconds it will take a while for the car to start. If I wait, it turns on fine. Also sometimes once it's on, if I quickly tap the gas a few times, it's like it can't keep up and the rpms don't move. Is that just typical DBW or is it a possible dying fuel pump, broken fuel filter?
* Registered users of the site do not see these ads.
Bleichroeder is offline   Reply With Quote
Old 09-28-2013, 08:21 PM   #2
trev762
Scooby Specialist
 
Member#: 280572
Join Date: Apr 2011
Chapter/Region: E. Canada
Location: southern ontario canada
Vehicle:
2011 sti sedan
plasma blue pearl

Default

Sounds like it could be the fuel pump but there is a lot of other variables that can cause this.

I would list any mods and how many k's r on the suby so u can get a more definitive answer.
trev762 is offline   Reply With Quote
Old 09-28-2013, 08:24 PM   #3
Bleichroeder
Scooby Newbie
 
Member#: 365470
Join Date: Aug 2013
Default

2007 WRX

TSX SRI (problem started before install)

JNA catback

Stock otherwise. It's done this since I purchased it a few weeks ago. She's got 83k miles
Bleichroeder is offline   Reply With Quote
Old 09-29-2013, 03:19 AM   #4
kazmihasi1@aol.com
Scooby Newbie
 
Member#: 185559
Join Date: Jul 2008
Chapter/Region: South East
Location: Charleston S.C.
Vehicle:
05 sti
psm

Default

you might have a small few leak somewhere that is allowing you fuel system to depresureize when its of. check the evap system, your vacuum hoses to the fuels system and the clamps on your fuel hoses. Before looking at the pump, but if it is the pump a walbro 255 is cheap and slides right in like a glove.
kazmihasi1@aol.com is offline   Reply With Quote
Old 09-29-2013, 12:03 PM   #5
Mr.Chow
Scooby Specialist
 
Member#: 256390
Join Date: Aug 2010
Chapter/Region: MWSOC
Location: Manitowoc, WI
Vehicle:
2004 Baja Turbo
Dark Blue

Default

check for leaks in the bay as well as near the fpr. My fuel pump squealed like a mofo before it died when it primed. I was on e85 tho with a walbro 255, so that was part of it.
Mr.Chow is offline   Reply With Quote
Old 09-29-2013, 12:25 PM   #6
Bleichroeder
Scooby Newbie
 
Member#: 365470
Join Date: Aug 2013
Default

I'm gonna go 255 anyway, so if the pump doesn't solve the issue I'll get on checking the hoses.
Bleichroeder is offline   Reply With Quote
Old 09-29-2013, 01:00 PM   #7
trev762
Scooby Specialist
 
Member#: 280572
Join Date: Apr 2011
Chapter/Region: E. Canada
Location: southern ontario canada
Vehicle:
2011 sti sedan
plasma blue pearl

Default

Quote:
Originally Posted by Bleichroeder View Post
I'm gonna go 255 anyway, so if the pump doesn't solve the issue I'll get on checking the hoses.
Id go with the dw365 its straight bolt on with no modding as the 255 walbro there is some modding to put in and can fk #^^$ up if not done right so keep this in mind and there's step by step posts for install.
trev762 is offline   Reply With Quote
Old 09-29-2013, 01:46 PM   #8
gurusan
Scooby Newbie
 
Member#: 258165
Join Date: Sep 2010
Chapter/Region: NWIC
Location: Beaverton
Vehicle:
2006 WRX Wagon
WRB

Default

For a Walbro on the 2007 there is very little modding, I wouldn't even call it modding. I put one on my 2006 and it was very straight forward. All you have to do is cut a hose a little shorter and slightly bend the pump mounting bracket. I would recommend buying a new fuel filter at this time as well, I didn't and now I have to go into that stinky tank again.
gurusan is offline   Reply With Quote
Old 09-29-2013, 02:38 PM   #9
BB2006LGT
Scooby Newbie
 
Member#: 367150
Join Date: Sep 2013
Default

Get a fuel pressure tester and see if it holds pressure after shut off. It not (from sounds of it it's not) then it's either pump or fuel pressure regulator. If you say you also sometimes have issues once it's started then it could be regulator leaking too much fuel by. I also think the DW is much better pump. The walbros suck.
BB2006LGT is online now   Reply With Quote
Old 09-30-2013, 08:57 AM   #10
tnguyen600
Scooby Newbie
 
Member#: 284699
Join Date: Jun 2011
Chapter/Region: Tri-State
Location: Philadelphia, PA
Vehicle:
2013 Impreza WRX STi

Default

I had a DW on my hatch...bad pump. Ran lean than rich then I spun a rod bearing. DW...never again.
tnguyen600 is offline   Reply With Quote
Old 09-30-2013, 09:54 AM   #11
ALOKIN
Scooby Specialist
 
Member#: 348177
Join Date: Feb 2013
Chapter/Region: TXIC
Location: TX
Vehicle:
2013 WRX STI Limited
E85 Tune w/ Dom1.5XTR

Default

Quote:
Originally Posted by tnguyen600 View Post
I had a DW on my hatch...bad pump. Ran lean than rich then I spun a rod bearing. DW...never again.

Rod bearings failures are almost always oil related.
ALOKIN is offline   Reply With Quote
Old 09-30-2013, 10:33 AM   #12
tnguyen600
Scooby Newbie
 
Member#: 284699
Join Date: Jun 2011
Chapter/Region: Tri-State
Location: Philadelphia, PA
Vehicle:
2013 Impreza WRX STi

Default

oil levels were good but I should've noted...cylinder 3 went to ****s
tnguyen600 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 11:36 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.