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

- - - - -

Fuel pump in 86 brat

  • Please log in to reply
3 replies to this topic

#1 Lukeortner


    New User

  • Members
  • Pip
  • 8 posts
  • Santa Fe, NM

Posted 12 December 2005 - 01:44 AM

Hi guys,

My fuel pump changes in tone before (and presumably during and after-I just can't hear it) I start my 86 brat.

Is this a sign that the fuel pump is ready to go?
I also have the pump wired through my cigarette lighter currently(I know there's no safety shut off with that set-up). Might this have anything to do with the vehicle having trouble starting?



#2 TomRhere


    Certified BRAT nut!!!

  • Members
  • 4,600 posts
  • Hillsdale, Mi. USA

Posted 12 December 2005 - 05:38 AM

All of my BRATs had varing noises from the pump, with the '82 being the noisiest. I believe it's just the pump reacting to the pressure build-up in the system.

Hard starting issues would be more related to carb or ignition issues, than fuel pump, as the float bowl has fuel in it and pump isn't really required to start engine.

#3 75subie


    I`m sold on Subaru

  • Members
  • 3,911 posts
  • Walden

Posted 12 December 2005 - 05:53 AM

this is perfectly normal, mine does the same thing

#4 Sixpack Subaru

Sixpack Subaru

    New User

  • Members
  • Pip
  • 5 posts
  • Melbourne, Australia

Posted 12 December 2005 - 06:53 AM

The pump that the carby versions run is an electric diaphragm type fuel pump, this will 'click' quite fast until pressure is built up. This system runs a return line from the carby 'needle and seat' inlet fitting that is a smaller ID than the delivery line. If it runs fine, the pump is fine:D

BTW: if you have cold start issues but it runs fine when warm I would be looking at Choke settings, unless they are semi-auto. ie: you put choke on, (pull it out), and it 'jumps' in by itself when a predetermined temp is reached? If it is full auto, (thermal bi-metallic strip), then set the choke at full cold to about 75% closed. Note that when you start a cold Engine on full choke it should not 'choke' itself, (ie chug and blow smoke), if it does the 'fast idle linkage may need adjusting, (this is done by bending the arm that goes to the throttle plate on the primary side to the choke butterfly plate.).

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users