Iv felt each relay and it clicks every time but fuel pump only runs intermittently and when does just keeps running but still no start

OK how hard are ecu chips to swap as mine has the tornado chip set. Also my fuel pump relay clicks every time even when fuel pump doesnt

I Is there a way of testing this at the ecu like a bypass of a pin or repairing the ecu

Would that cause it not to pump intermittently and not start cheers

Hi everyone my 3.9efi cut out when driving and now intermittently when turning on the ignition the fuel pump runs but doesn't stop priming other times there is nothing I have run a feed to the pump and it runs and I get pressure to the rail but still won't start in completely lost