Welcome to the North American Subaru Impreza Owners Club Tuesday September 23, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Rocky Mountains Impreza Club
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 Chapters > Rocky Mountains Impreza Club Forum -- RMIC

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 03-30-2011, 01:25 PM   #1
silverongold
Scooby Specialist
 
Member#: 132599
Join Date: Nov 2006
Chapter/Region: RMIC
Location: St George
Vehicle:
02 impreza wrx
silver

Default fuel pressure regulator test?

does any one know an easy way to test a fuel pressure regulator to see if it is bad?
* Registered users of the site do not see these ads.
silverongold is offline   Reply With Quote
Old 03-30-2011, 01:38 PM   #2
car_cursed
Scooby Guru
 
Member#: 85327
Join Date: Apr 2005
Chapter/Region: RMIC
Location: West Jordan, UT
Vehicle:
More projects than
you can shake a stick at.

Default

Put on another known working one.
car_cursed is offline   Reply With Quote
Old 03-30-2011, 01:40 PM   #3
silverongold
Scooby Specialist
 
Member#: 132599
Join Date: Nov 2006
Chapter/Region: RMIC
Location: St George
Vehicle:
02 impreza wrx
silver

Default

does any one around have one from a 2002 wrx that they would be willing to let me try?
silverongold is offline   Reply With Quote
Old 07-10-2011, 02:37 PM   #4
bswilmington
Scooby Specialist
 
Member#: 217563
Join Date: Jul 2009
Chapter/Region: South East
Location: Eden NC
Vehicle:
2006 Sti 12.68 @ 108
321WHP 422WTQ dynojet SAE

Default

Quote:
Originally Posted by car_cursed View Post
Put on another known working one.
Bad answer.

Put fuel pressure gauge on the car and check base pressure, should be around 35-38psi, then unplug vaccum hose going to the regulator and pressure should rise to 43psi. If its adjustable then someone may have set base pressure higher. If these are correct, but you still think there is problem then put gauge where you can read it going down the road and the regulator should add 1 pound fuel pressure to 1 pound of boost over fuel pressure with the regulator unpluged.

So if you have unpluged pressure of 43psi and you run 20psi of boost, then at peak boost you should have 63 psi of fuel pressure.
bswilmington is offline   Reply With Quote
Old 07-10-2011, 04:39 PM   #5
car_cursed
Scooby Guru
 
Member#: 85327
Join Date: Apr 2005
Chapter/Region: RMIC
Location: West Jordan, UT
Vehicle:
More projects than
you can shake a stick at.

Default

Yeah double post Sunday.
car_cursed is offline   Reply With Quote
Old 07-10-2011, 04:40 PM   #6
car_cursed
Scooby Guru
 
Member#: 85327
Join Date: Apr 2005
Chapter/Region: RMIC
Location: West Jordan, UT
Vehicle:
More projects than
you can shake a stick at.

Default

The ****? Why bump a 4 month old thread?
car_cursed is offline   Reply With Quote
Old 07-10-2011, 07:24 PM   #7
bswilmington
Scooby Specialist
 
Member#: 217563
Join Date: Jul 2009
Chapter/Region: South East
Location: Eden NC
Vehicle:
2006 Sti 12.68 @ 108
321WHP 422WTQ dynojet SAE

Default

In case someone is searching on how to test a FPR.

I posted the real way to test it instead of "install a new one" or in case the guy needs to know in the future. Is that a good enough reason?
bswilmington is offline   Reply With Quote
Old 07-18-2011, 07:35 AM   #8
Buurma
Scooby Newbie
 
Member#: 258394
Join Date: Sep 2010
Chapter/Region: MWSOC
Location: N. Ohio
Vehicle:
2001 GC8
Pear black

Default

good enough for me.

i thought the pressure at idle was 42 psi? but anyway my fuel trims are super high and the car runs very lean. so something is bad for sure.
Buurma is offline   Reply With Quote
Old 07-18-2011, 09:05 AM   #9
axelthrasher
Scooby Guru
 
Member#: 144779
Join Date: Mar 2007
Chapter/Region: MWSOC
Location: In the land up over
Vehicle:
200X ZOMG a car 100%
crabon fibre girlfrendorz

Default

Quote:
Originally Posted by Buurma View Post
good enough for me.

i thought the pressure at idle was 42 psi? but anyway my fuel trims are super high and the car runs very lean. so something is bad for sure.
If I remember correctly, my car idles at 38 PSI with a stock unadjusted/unmolested FPR.
axelthrasher is offline   Reply With Quote
Old 07-18-2011, 12:22 PM   #10
Buurma
Scooby Newbie
 
Member#: 258394
Join Date: Sep 2010
Chapter/Region: MWSOC
Location: N. Ohio
Vehicle:
2001 GC8
Pear black

Default

sweet i'm trying to diagnose a tired fuel pump over a bad fuel pressure regulator.
new fuel filter. lean under boosht. super high fuel trims. like +15 for short and long term
new o2 also. chassis has 180k on it.
Buurma 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel pressure regulator - how to test ? goixiz Factory 2.0L Turbo Powertrain 2 12-29-2010 03:55 PM
BDL fuel rails and fuel pressure regulator living4surf Engine/Power/Exhaust 2 09-29-2007 09:38 AM
Fuel Pressure Regulator testing Scooby_Rex Factory 2.0L Turbo Powertrain 1 03-06-2007 01:05 PM
Fuel Pressure Regulator and/or Fuel Rails? mav1c Factory 2.0L Turbo Powertrain 1 01-19-2003 03:23 PM
SVX Fuel Pressure Regulator Solved Idle Pressure Problem the Dabbler Normally Aspirated with bolt-on Forced Induction Powertrain 23 11-05-2001 09:20 PM


All times are GMT -4. The time now is 10:03 PM.


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.