Well, i guess this is the right place to ask around.. A friend of mine is building a 929 Coupe with a NA 13B for his girlfriend and evereything is finished, except for one thing.. The engine wont start.. At least not on its own. We kinda know what the problem is, the injector jets arent spraying fuel.. It seems like they arent getting signal from the ECU. It will however start if we ground a wire and flick it against the ground wire coming from the injectors

The engine is a 87 13B, as said NA, and the complete wire loom from the donor RX7 is transplanted into the 929. What we are trying to figure out is, what is the smallest number of cables that have to be connected to the ECU to get the engine started?

Any help would be great.. Thanks..

 

Start by blinking the error codes.
First suspect - the CAS.