Jump to content
SAU Community

What's This ;thing; On The Standard Fuel Pump?

Torques

By Torques,
in Engines & Forced Induction

 Share

Recommended Posts

Sarumatix Veteran

Sarumatix

Posted
Posted

Basically if you install a pump that doesn't have one of these, you have to prime the system before you start the car (044 for example). This simply involves turning the ignition on and letting the fuel pump run for a few seconds before turning it over.

The Dan Grand Master

The Dan

Posted
Posted

Basically if you install a pump that doesn't have one of these, you have to prime the system before you start the car (044 for example). This simply involves turning the ignition on and letting the fuel pump run for a few seconds before turning it over.

Yeah that's basically what every EFI car does anyway. Having the system hold pressure is the whole purpose behind how an injector works properly so having a fuel system that doesn't hold pressure is going to cause some starting issues.

You are better off having it than not

Torques Mentor

Torques

Posted
  • Author
Posted

Hi there,

Thanks for the reply.

The check-valve sounds like a good thing to me.

Can I detach the valve and fit it to my new pump, or is it non-removable from the standard pump?

Tomei and Nistune replacement pumps seem to have this valve present while other universal pumps don't

Thanks ...

  • 3 weeks later...
Torques Mentor

Torques

Posted
  • Author
Posted

Hello,

I have recently received a Skyline R33 S2 pump (at least that's what I've been told)

The pump does not have this 'valve' but there is something which looks like a pressure valve (?) at the upper halfe of the pump.

Would anybody know what this is?

Secondly, is there a difference between Spec1 and Sepc2 fuel pumps?

Many thanks ...

post-33912-0-74797300-1296902503_thumb.jpg

  • 2 weeks later...
SiR_RB Grand Master

SiR_RB

Posted
Posted

having starting issues myself, ive got a Sard 280lph direct fit fuel pump. its using the standard fuel lines in the tank, standard cradle etc

does this pump have a check valve?

my car never had this problem up until few weeks ago, pumps been in there for about 3ish weeks or so

lachlanw Veteran

lachlanw

Posted
Posted

all you lot are wrong .

its a spring loaded relief valve . dumps fuel out of the line back into the tank it the line gets blocked or something . stops the hoses blowing off in the engine bay

The Dan Grand Master

The Dan

Posted
Posted

all you lot are wrong .

its a spring loaded relief valve . dumps fuel out of the line back into the tank it the line gets blocked or something . stops the hoses blowing off in the engine bay

So why can you blow through it one way and not the other?

SiR_RB Grand Master

SiR_RB

Posted
Posted

my fuel line coming off the fuel pump had one of these inline with the fuel hose about 20cm or so from the pump

does it do the same thing? looks like a fuel regulator or something

got a pic but cant attach for some reason

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • brillo
      Leak from Tokico BM50 Brake Master Cylinder

      By brillo · Posted

      Hi, SteveL Thank you very much for your reply, you seem to be the only person on the net who has come up with a definitive answer for which I am grateful. The "Leak" was more by way of wet bubbles when the pedal was depressed hard by a buddy while trying to gey a decent pedal when bleeding the system having fitted the rebuilt BM50 back in the car, which now makes perfect sense. A bit of a shame having just rebuilt my BM50, I did not touch the proportioning valve side of things, the BM50 was leaking from the primary piston seal and fluid was running down the the Brake booster hence the need to rebuild, I had never noticed any fluid leaking from that hole previously it only started when I refitted it to the car. The brake lines in the photo are "Kunifer" which is a Copper/Nickel alloy brake pipe, but are only the ones I use to bench bleed Master cylinders, they are perfectly legal to use on vehicles here in the UK, however the lines on the car are PVF coated steel. Thanks again for clearing this up for me, a purchase of a new BMC appears to be on the cards, I have been looking at various options in case my BM50 was not repairable and have looked at the HFM BM57 which I understand is manufactured in Australia.  
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      PXL_20250828_063541093.TS.mp4
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      Well the install is officially done. Filled with fluid and bled it today, but didn't get a chance to take it on a test drive. I'll throw some final pics of the lines and whatnot but you can definitely install a DMAX rack in an R33 with pretty minor mods. I think the only other thing I had to do that isn't documented here is grind a bit of the larger banjo fitting to get it to clear since the banjos are grouped much tighter on the DMAX rack. Also the dust boots from a R33 do not fit either fyi, so if you end up doing this install for whatever reason you'll need to grab those too. One caveat with buying the S15 dust boots however is that the clamps are too small to fit on the R33 inner tie rod since they're much thicker so keep the old clamps around. The boots also twist a bit when adjusting toe but it's not a big deal. No issues or leaks so far, steering feels good and it looks like there's a bit more lock now than I had before. Getting an alignment on Saturday so I'll see how it feels then but seems like it'll be good to go       
    • PranK
      R35 GT-R production ends after 18 years

      By PranK · Posted

    • SteveL
      Leak from Tokico BM50 Brake Master Cylinder

      By SteveL · Posted

      I don't get in here much anymore but I can help you with this.   The hole is a vent (air relief) for the brake proportioning valve, which is built into the master cylinder.    The bad news is that if brake fluid is leaking from that hole then it's getting past the proportioning valve seals.   The really bad news is that no spare parts are available for the proportioning valve either from Nissan or after market.     It's a bit of a PITA getting the proportioning valve out of the master cylinder body anyway but, fortunately, leaks from that area are rare in my experience. BTW, if those are copper (as such) brake lines you should get rid of them.    Bundy (steel) tube is a far better choice (and legal  in Australia - if that's where you are).
×
×
  • Create New...