hi guys hope you mite be able to help me i keep lossing fuel pressure ....

the car ticks over fine its had new fuel and new fuel fillter ,,,had new fuel pump by pass the fixing on top of the pump so no leck there , changde the driver control module .ive by pass the fuel cut off swich ..

i ve had ford scan and ids pluged in ,but it just shuds me the the pressure and the volte tha car dives fine apart from that ive check the power to the power control module and to the pump ever thing loos fine

car is charging at 13.7 so dont no if that will make any diffrence......and can any one tell me how to test the fuel pressure swich