mrbbebe Posted May 3, 2013 Report Share Posted May 3, 2013 hellow,i'm having a problem trying to connect the fuel pump relay to work with the yellow wire coming from the fc-1s ecu. the problem that i have is that this yellow wire that active the relay when u put the ignition switch on and engine is running dont work...i test this wire and i find out that with out keys in ignition this wire always have ground and active the fuel pump with out ignition switch on or engine running..Ifind out the yellow fuel pump relay wire coming from the fc-1s with ignition switch off have ground and this is a no no because the fuelpump will be running with out engine running.the weird is that wire when i put the switch on and crank it the gound disappear.......so ecu with out power constatly giving ground to the relay and with ignition switch on and running not giving signal or power to the relay.....any help i will appreciate sincerly Hector Link to comment Share on other sites More sharing options...
psu_Crash Posted May 9, 2013 Report Share Posted May 9, 2013 So does the car start? You should have the +12V to your fuel pump connected from the stock main relay or at least switched 12V so that when the key is off there is no power to the fuel pump. The injectors and coil should also be powered this was. Link to comment Share on other sites More sharing options...
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