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

[Torques]

Hello ..

I want to replace my fuel pump and by looking at pictures of the original one I was wondering

what that 'thing' at the end of the pump is?

Many thanks ..

[The Mafia]

its the check valve. Once the fuel is pushed out, it stops the fuel going backwards, going back in.

[Sarumatix]

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]

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]

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 ...

[DVS JEZ]

044 etc u can put a check valve on it at the outlet

[The Dan]

044 etc u can put a check valve on it at the outlet

The 044 comes with a check valve already on it

[Torques]

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 ...

[SiR_RB]

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]

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]

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?

[Adriano]

Maybe it is both

[SiR_RB]

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