I have an 85 rx7 gs. Im running a street fire ignition box for a DFIS. I just got the motor and tranny installed and began to try and start the car for the first time and my fuel pump would not come on whenever i turned the motor over. I can jump the relay (blue and black wire) and it will come on, but whenever the relay is plugged back up, it still does the same thing. Thats the first problem. The car will crank but the trailing ignition isn't working for some reason, i believe its a bad coil. But whenever the car is running, i can cut the key off and it still stays running until the car dies. The coil wire (Black with white strip) that im using for my ignition box trigger wire keeps 12v when the key is off and the car is still running, then when it dies it goes to 0. I've checked all the grounds i could, checked all the fuses, they're all good. I'm lost and really ticked If anyone would know where my next step should be or what i should do, please tell me. because i hate to see my baby not run right and not be able to drive her. and also my tack isnt working. I have no clue what would make that not work. All i know is i got some bad wiring problems that i have no idea how to fix or what to look for to try and fix them.

 

Your fuel Pump Cut relay is bad. Put a jumper wire between one of the Black/white wires and the Blue/white wire. That should make the fuel pump turn on when the ignition is turned on. The Black/white wires connected to the + side of the coils and ignitors come from the ignition switch. They should have 12V only when the ignition is turned on. The Yellow/blue wire on the - side of the leading coil connects to the - side of the leading (front) ignitor. The trailing coil - side should have 2 Yellow/green wires. One goes to the - side of the trailing (rear) ignitor. The other Yellow/green wire connects to the tach.

 

i've hooked the wires that you stated up and still nothing. now my coils aren't even firing and they have 12v too them. My car is being stupid, and i hate screwing with wiring. the tach still doesn't work either

 

Are you getting 12v on the yellow/green wire from trailing coil? Or better yet, are you getting the 12v to the tach?