Welcome to the North American Subaru Impreza Owners Club Saturday November 18, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Water/Methanol Injection, Nitrous & Intercooler Cooling

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. 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 07-30-2012, 01:09 PM   #11
Scooby Specialist
Member#: 129681
Join Date: Oct 2006
Chapter/Region: MAIC
Location: WV
2017 FXT-T ES


Originally Posted by J_Maher_WRX View Post
What is this BPV sense hose issue you speak of? Please explain
Your BPV is the device that vents your intercooler depending on intake manifold pressure/vacuum. It bolts onto your intercooler, with the vent hole in the flanged base. The vacuum/pressure hose that tells it what to do connects to a nipple on the side. THE OTHER END of that hose, this sense hose, connects to a nipple on the rear bottom of the intake manifold under the intercooler. This nipple, like ALL the nipples on the plastic intake manifold, is a straight, non-barbed, slick plastic nipple... and all the hoses attached to it WILL blow off one day. When all but one of these hoses blow off... usually as a result of having been moved or under greater than stock boost... your car will become very unhappy. It throws a CEL and goes into limp mode.

To prevent the hoses from blowing off the best solution is to use a Corbin Clamp... Subaru uses them on the small overflow hose from the turbo coolant tank, for example. These clamps are the ones you pinch to open, slide onto the hose, put the hose back on the nipple, then slide that clamp onto the nipple portion of the hose. Some people zip-tie the hoses... these can and have failed as the zip-tie is not a dynamic clamp that adjusts to the aging hose. The Corbin style clamp is the permanent failsafe solution.

When you work on the engine you loosen these hoses because you move them. Thus, because installing the BP Mod requires removing the TMIC, the one inaccessible hose is disturbed and should be clamped. Even if you didn't do it then, it is still a good idea to clamp the numerous hoses attached to your intake manifold.

One hose, the Fuel Pressure Regulator sense hose, is far more problem if it comes off... if this hose blows off you will likely need a new engine. It is easy to get to, on the end of the IM on the driver's side. Clamp your hoses, and if you have a T in your boost control, do the same. All these hoses are thought of as "vacuum" hoses, but they also see boost.
SeeeeeYa is offline   Reply With Quote

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
TurboXS TMIC install question roybfr Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 14 11-01-2004 03:11 PM
APS TMIC install rjrutzky Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 6 12-05-2003 01:48 PM
TMIC installation = major PITA redrexx STi Forum Archive 4 06-25-2003 01:41 AM
new tmic installed krex Texas Impreza Club Forum -- TXIC 26 05-08-2002 02:53 PM
help with mrt's tmic install axis Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 02-21-2002 10:38 AM

All times are GMT -4. The time now is 08:26 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.