skrats

iTrader: (1)

hi all , i have just noticed that the top of my fuel reg (at the front of the fuel rail) has a hole in it and it looks like something should be screwed into it , i have running issues at the moment and cant for the life of me remember if anything was ever in the hole !!!! should ther be ,,,, its a 4x4 saph

oldford

When new there's a plug in it. Under the plug is a screw which can adjust the pressure.
Be careful! If you turn the screw too far, it will damage the regulator.
Standard fuel pressure is 3.5 bar with key on, engine off.

skrats

iTrader: (1)

i aint toughing it , but it dont matter if the hole is open ?? i was just making sure nothing was missing ?

oldford

No, doesn't matter. What are the complaints?

martysmartie

iTrader: (1)

As said there is an Allen screw to adjust the pressure when new there was an alloy fitment in there to stop people tampering with it, and for good reason as there isn't a need to adjust it unless you have aftermarket chip which rarely are written for different than standard fuel pressure (3.5 bar).

To have it removed is pretty common unless you are lucky enough to own a totally standard one that has not been played with and will not effect running at all.

Whats wrong?

Martin

Toe Knee

iTrader: (2)

as said, if theres a grub screw in the hole then ur fine if not then u have a problem!! when i say fine thou obviously just being there doesnt mean ur pressure is set right!!

tabetha

If you think it is a pressure problem, just measure it.
When the plug is removed, along with the hard plastic sealant below it, it can then be adjusted if needed.
When the plug is removed this introduces a the tiniest of air leaks as the top half of the reg is connected through the vac pipe to the inlet, but certainly not anything you even need to consider it's so insignificant.
There are two diaphragms inside seperating the top(vacuum) and bottom(fuel) half of the reg, if just one goes it will affect it.
tabetha

Toe Knee

iTrader: (2)

also remove the intercooler hose and have a look if theirs an oily substance in the thrrottle body, on my last cossie it had it and obviously i thought it was oil but on good advice from Stu, it was actually a fucked regulator and was fuel not oil in the TB!!

tabetha

Simply sucking on the vac pipe will confirm this, or not as the case may be.
tabetha