Hi i'm new to this and I sure hope you guys can help me? I have a93 G20 sport van,it has the 305,it gets no spark out to the plugs,so far I have replaced the coil,knock sensor,ignition control module,ecu,tcs,distributor pikup coil,rotor,cap,tested all the in line fuses and still I am not getting any fire out to the plugs?When I Run the diagnostic test aldl B-to the ground it pulses 3 pause 3 which is code 43 that says MAP sensor MY ? would that make this van not start? I have put so much $$$$$$ into it now Please help?!!!!