"Ralf Ballis" wrote in message
...
The best way is to remove the pump and attach it to a test arrange to
check
for all of fuel delivery aspects.


Yep. Bench test, calibrate and time it.
FWIW the injector crack-off pressure is probably many times 3000psi. and it
is more likely that your injectors need service, although mechanically
controlled pumps do have an awful lot that could go wrong, especially if it
has automatic cold start, temperature and altitude compensation etc.

Huw