I need to check fuel pressure on my car. The gauge I have has schrader type valve fittings which is not the type of fitting at the end of the fuel rail. I am thinking I can hopefully find a fitting of the correct size with a barbed end on the other end of the fitting that I can then slide some fuel hose over the barbed end and attach it to my gauge. I just need to know the size/pitch of the fitting on the end of the fuel rail.

 

It's called a globe seal fitting available from BAT

 

link? size??

 

You're going to have to call them
I believe it's 10mm x -3 hose I had to make a hose for my gauge. Some guys try to use a straight thread adapter for this connection but this is not correct, that's why there's a steel ball under the cap. "Globe Seal"

http://www.batinc.net/mocal-central.htm

 

I ordered two of them last time

 

The thread size is M14x1.5 or M12x1.5... just measure the diameter. I bought my fuel pressure gauge from Arnnworx for something like $40 and it's a direct fit.

 

measured all connections from early 944 fuel rail.
end cap nut is M12x1.5. Requires female thread if replaced.
two on the other sides are M14 x1.5 and M16x1.5, male if replaced.
The one on the other end (close to firewall) is M16 x1.5, male if replaced.

 

+1 for the Arnnworx gauge. He might have the fitting available separately too if you don't want the whole gauge.

I tried Option 1 described here (make an adapter from a spare fuel rail cap) but it didn't seal. I don't think it's enough to get the right thread - it has to have the little dome shaped piece that seals the same way the ball does in the fuel rail cap. The Arnnworx one has this and will seal perfectly.

 

check your hood clearance if you are going to fit a gauge at the end of the rail.
otherwise you might end up with a nice ding like i did..