Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

Installing SPFI fuel pump on Carbed Wagon


  • Please log in to reply
5 replies to this topic

#1 ystrdyisgone

ystrdyisgone

    USMB Regular

  • Members
  • 423 posts
  • MT

Posted 17 May 2014 - 01:28 PM

I got the old fuel pump off today, it looks like I'll have to get a bigger hose for the outlet, as the one on the SPFI pump is fairly large. I'm hoping that larger hose will fit snugly on the hardline at the other end. Can someone tell me what the pcv looking thing is on the old outlet hose though? And whether or not I need to keep it?

 

 

Oh and I'm pretty sure I've got it right, but want to make sure, I've got a black wire and a red and green wire going to the fuel pump. Red and green is positive?



#2 bratman18

bratman18

    ADIDASubarus

  • Members
  • 3,508 posts
  • Jefferson, Maine

Posted 17 May 2014 - 01:55 PM

Those little things are just silencers.

#3 czny

czny

    USMB is life!

  • Silver Subscribers
  • 343 posts
  • Azusa, California

Posted 17 May 2014 - 02:59 PM

The larger end(12mm) of pump is supply from the tank. The 90* small end(8mm) goes forward to injectors. You'll need to run a 5/16" line for fuel return to tank, all the way. Here's bulk steel tubing:http://www.summitrac...arts/sum-220156

 

and here:http://www.ebay.com/...825921683&rt=nc


Edited by czny, 17 May 2014 - 03:18 PM.


#4 ystrdyisgone

ystrdyisgone

    USMB Regular

  • Members
  • 423 posts
  • MT

Posted 17 May 2014 - 05:07 PM

Sweet, then I shall get rid of it.

 

Czny, thanks! Good thing I didn't install it already. I've read in other people's swaps that they just replaced the rubber hoses with spfi hose (in the engine compartment, and at the pump) I was thinking of just doing that rather than run a whole new line. Think it'll work?



#5 czny

czny

    USMB is life!

  • Silver Subscribers
  • 343 posts
  • Azusa, California

Posted 17 May 2014 - 05:34 PM

Sweet, then I shall get rid of it.

 

Czny, thanks! Good thing I didn't install it already. I've read in other people's swaps that they just replaced the rubber hoses with spfi hose (in the engine compartment, and at the pump) I was thinking of just doing that rather than run a whole new line. Think it'll work?

No, I meant a return line for fuel. Carbed cars do not have this - FI cars do. Its needed to releave the excess pressure/fuel from the FI plumbing up front at the intake manifold. 

Several others have already done this before - search & you'll find. 

 

EDIT: Seems I mis-spoke about the return line. Scanned some pages from the 87 FSM:

CCF05172014_0002_zpsbcc26f3d.jpg CCF05172014_zps08909ff9.jpgCCF05172014_0001_zps8dea45d1.jpgCCF05172014_0003_zps137f5fb2.jpgCCF05172014_0004_zpsb34e4b18.jpg

 

I was thinking of my carbed 73Chevy 4x4 conversion to TBI. Ooops!


Edited by czny, 17 May 2014 - 06:33 PM.


#6 ystrdyisgone

ystrdyisgone

    USMB Regular

  • Members
  • 423 posts
  • MT

Posted 17 May 2014 - 06:41 PM

Sweet, yeah I was pretty sure there were one too many lines when I was unhooking the old engine. Thanks for the scans!






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users