sidneyam

Hey guys,

I got my car up and running but I think I have a leaky fuel line because theres a strong scent of gas. Can anyone tell me which lines to check?

hoov100

All of the rubber ones that hold gas under the hood....

ZLover4Life

+1


lmmfao.

sidneyam

Can you be a little more specific like where the location of the fuel regulator in this car

hoov100

fallow the fuel line from the filter to where it goes into the fuel rail and it's right there. I wanna bet that it's te little line tat connects the fuel rails.

xpwarrior

Actually when you follow the fuel line from the filter to the rail you get to the pulse damper first. The pressure regulator is at the other end of the fuel circuit where it goes to the return line.

Sidneyam here is a link to a diagram of the fuel circuit.

http://www.courtesyparts.com/300zx-p...3_900_902.html

hoov100

You wanna try that again? The fuel goes from the fuel pump, to a dampener to the filter to the FPR, to the fuel rail, to another dampener and back into the tank. You wanna know how I know? Because I spent two weeks of my life going through the fuel system on the TT from top to bottom.

xpwarrior

22675M is the damper and is the next component after the filter. Filter -> Damper -> Rail -> Other Rail -> Regulator -> Tank

hoov100

That's not how mine has been hooked up. Still runs great though

ZLover4Life

The regulator should be the last thing in the circuit before the return to the tank.... that's how it works. It closes and opens, limiting how much is released back into the tank, to regulate the pressure.

WildmaN

That's funny, my fuel pressure regulator on my 280zx, does exactly the same thing. And is the last thing, before fuel goes back to the tank. So they pretty much kept how the fuel was processed. Just added quite a bit more technology since my Z model.

Mine goes fuel tank, fuel damper, fuel filter, in to the rail, out the regulator, and back into the tank.

Anyway, I never really thought real hard. As to how the system was set up the way it is. Now it makes a lot more sense. I guess you could say, I learned something today.

ZLover4Life

That's also how it maintains pressure with the engine off. If the fuel pressure regulator were not after the rail, all the pressure in the rail could just release through the return into the tank and it'd take forever to start the car (and for that matter, hoov, I think you're mistaken - I don't think a car would run if the FPR weren't after the rail to maintain pressure). But when the engine is off, the FPR closes, keeping all the pressure in the rail.

sidneyam

Haha thanks guys, a while ago when I had it at a shop they said the FPR hose was leaking fuel. So I just follow the fuel filter line eh?

sidneyam

Also do you guys know if I have to remove anything in order to et to the FPR?

ZLover4Life

Just look for this. It's on the back of the plenum and there are only two fuel components there - damper and regulator. Link below is what you're looking for. But seriously, this entire thread is a joke - follow the fuel lines until you find the leak, don't just go replacing ****. And nothing needs to be removed to access the FPR.

http://www.courtesyparts.com/22670m-...tml?cPath=882&

PS hoov is probably right about it being the line that connects the rails... if you don't find a definitive leak, take it to a reputable Z shop, because you won't be able to handle a plenum pull to replace that one, yet.