hi i have a mk 6 escort van, and i want to open up the diesel pump aswell. i ripped off the safety plate which stops you tamperin where the injector pipes come out and found a allen key thread with a locking nut and wound it in and out but either way it never made much difference. what is the big hexagon bolt on the pump for? would that have anythin to do with tunin the pump up? if anyone has any idea of tweakin up the diesel pump please let me know