Thanks Peter.

I have coda but probably didn't put much thought into it.

Are you saying, if I plumb the coda in and disconect the fuel pipe from the rail, I can simulate the pressure with some kind of regulator or clamp the pipe, run the pump and measure flow while it flows into a container.

I've had it on the dyno with coda plumb in near the fuel filter this morning, I ran it up to 100mph, full load, I was thinking if the injectors are more or less fully open at this point I should see flow on the coda, But i didn't, pressure was fine but flow was zero. Would this be a wrong method of testing?

Chris