Fuel Pressure Regulator?

[Jules]

Could someone tell me if this pic a fuel pressure regulator?
It's from my '91 GSi.
If not a regulator then what is it?
Also how much roughly from Vauxhall?

Mine leaks optimax like it's going out of fashion!!
:roll:

http://homepage.ntlworld.com/julian.sumner/FuelPressureReg.jpg

Cheers in advance.

[Jules]

No one knows what it is?
It sits by the rear drivers side wheel just after the fuel pump.
:roll:

[_JH_]

basically yes. its often called a damper. should be able to get one from a scrappy for peanuts

[mowgli]

yes it is a damper, it helps take the shocks out of the fuel pressure, ensuring smooth fuel delivery. they cost about ?40 from the dealer. you cam run without it, using a piece of metal pipe as a joiner. I would not recommend doing this for long though. the fuel pressure regulator is on the fuel rail (near the injectors)

[epo]

what happens if you run for long with out one as i had one on mine but it was correded and leaking fuel out of it

[Aragorn]

mines been running without one for yonks perfectly fine

the idea is say u snap the throttle closed, flow rate changes dramatically as the injectors close down, for a split second the pressure spikes then falls once regulator catches up - that damper is designed to take some of that shock away from the pump itself