car only sparks once then stops?

I have a 1990 Toyota cressida that I'm working on and I just did an engine swap in it put in another 7mge motor in it and now it only sparks one time then stops. I need a price that is on the fire wall that connects to the wiring harness and connects to the coil known as a igniter. Its not under the coil it is located on the firewall. Please let me know what this is called because I am not to familier with this car.