i just finish putting a b18a1 on my 91 crx si .what do i do if gas doesnt flow to the motor and it got no spark?

 

Main Relay possibly? And recheck your wiring.

 

how do you know your not getting fuel or spark

 

It's pretty simple to tell, while cranking, take one spark plug wire out, ground it to something, hear a tick? If not, no spark. Loosen the fuel line a bit, crank the motor, gas not leaking? No gas.

Check your relay and your wiring. Sounds like you forgot to reconnect something.

 

i recheck the wires and there all good and i did that one thing with spark plug wire and nothing happens and all the relay are good

 

most likely wiring

 

do i need to use the ls harness or the harness form the crx?

 

cuz the harness i got its a obd0 and the motor is a obd1 so wat do i do?

 

you have to use the crx harness ...it is cranking right?...check grounds and wiring its gotta be in the wiring somewhere