i just rebuilt my 76 motor and had su's for a while. i wanted to put the stock injection back on but ran into some problems once it was installed. it seems that with the fuel pump installed the car will not even start. now when i disconnect the pump the car will start and run out the fuel in the lines. it even performs well. what is causing my problem with not being able to connect my stock pump. by the way it is putting out ample pressure and i even tryed changing pressure regulators. the injectors are all working. i took off the plugs and they are soaked in gas. i've tryed changing air flow meters. i took off the metal lines on the intake and tryed blowing compressed air through them to make sure they were not clogged since i was not receiving any fuel from the return line. any suggestions or answers would be appreciated.