It's definitely under pressure, as I had a face full of fuel when I removed the FPR :-)
cleaned the injectors in an ultra sonic bath & changed the fuel filter.. attached results
seems to have made a difference.. working at 112% at full load now.
its not a case of having some pressure.. lol... but that it follows the boost.
rising rate fuel pressure regulator.. so fuel pressure should track boost If it does'nt its tired
Bare in mind that the failure of my engine MIGHT have been low fuel pressure, and if you havent seen what that resulted in then check it out. Its worth checking.
Only a case of slicing into the fuel feed to the rail with a mechanical pressure gauge.
When you say slicing.... cut into the pipe going to the fuel rail (opposite side to the FPR) put a T piece in then put a pressure gauge on the T piece.. connect it all up and run the car? Sure I've got a tyre pressure gauge somewhere.. and big one with a dial, you reckon that will do?
I wouldnt be using a tyre gauge, not often you take i pump to 4 bar lol.
Will have to be a proper One for the job, to be safe, and one that will record max value.
In fact digital would be best, routed to the cabin.