just swapped in a zc into 91 si. followed every install guide known to man, now when truning key to ON position, and at start position, main relay clicking non-stop.
sounds like a machine gun goin off inside the relay. the ECU light is coming on and stayin on. when cutting the key off map sensor clicks off. any help????!!!!! thanks!!!!!!!!

 

you need ground check ground wires in the engine bay this happened to me

 

probably the ground on the thermostat housing...had the exact same problem