If you are getting fuel pressure at metrering head but not injectors, then most likely flap is stuck or adjusted badly(very).
Use a thin screwdriver to push down on metering head flap whilst cranking and see what happens if the flap moves down and pressure exists it will have no option but to go easiest route to injectors.
The MFI injectors run a continuous spray, but need a LOT OF PRESSURE compared to EFI.
Sad to say EFI is better but MFI workable and for someone of the likes of KARL NORRIS to say EFI is crap, he may have been taken out of context as EFI is a vast improvement over MFI but by no means perfect.
NO FACTORY FIT SYSTEM IN THE WORLD is any good compared to AFTERMARKET 3D ECU, BUT THEY CAN ALL BE MADE MUCH BETTER WITH TWEAKS, factory fit systems have to meet so many different criteria to aftermarket, whise clients are generally after just power.
Some tuners forget that not everyone has a unlimited budget, but honestly I don't imagine KN to be one of these as he is a genuine good guy.
tabetha