Checking Tandem Pump Pressure?

Hi guys,

I have a 150PD which stutters under boost. It does it both cold and at temperature. I don't get any black smoke out the tailpipe.

I thought that maybe the tandem pump was failing to make sufficient fuel pressure and wanted to check it.

I have 2 questions:

1) My Haynes manual doesn't tell me where I can check the pressure from, so does anyone have a photo / diagram to show me where the screw is that I need to undo in order to screw in a guage?

2) Where can I get the fuel pressure guage and connector from?

Many thanks,

Rich

In this picture:



The arrow is pointing to the port. The port is 12mm X 1.5mm with a washer face seal.

Legend!

Thankyou very much!

Rich