i just swaped a b18b into my 90 and it refuses to start. all of the lights except the cel come on, on the dash. i dont hear the pump prime or starter solenoid click when you turn the key it does nothing. i replaced the main relay and it didnt do anything. i tried swapping computers with 3 other known good ecu’s and it doesnt do anything, so it seems like something is stopping the ecu from getting power. the distributor is also known to be working fine. Does anybody have any ideas or input, anything im getting really frustrated with the car lol? Thanx
Check all fuses. Are you runnig the original obd0 ECU
check grounds as well
all the fuses are good and also the grounds. i added two 4awg grounds from the engine to the chassis