Hello I have a 1985 rx7 and I decided to buy my friends N/A motor from his 91. The car was ran off of a MS1 V3 with a secondary VR input. My friend bought the car with this setup and the whole car came running already. He decided he wanted to put a turbo motor in his car so he took it to a shop and had them swap the motor for him. When I had received his old motor and harness from him I had noticed that they had cut off pretty much every connector. I have about 90% of the wiring completed. The only things I cannot figure out is the CAS and the coils. I have FC coils that I want to use in the car. Right now I have 4 separate wires coming off of the CAS, two blues and two silvers. Any information would be awesome guys. Also if anyone needs to see pictures of the board or the harness just let me know. Thanks a lot!

 

See the Megasquirt wiring diagram at:

http://www.aaroncake.net/rx-7/megasq...Megasquirt.asp

 

There is 1 wire wire for trigerng the primaries and 1 wire for secondary injectors? I though each injector has its own triger wire, that means primaries fire at the same time? and same go for secondaries?

 

The MS1/MS2 is batch fire, so each back of injectors is triggered from one wire.

MS3 is sequential so there is one wire and driver for each injector.

 

Can ms1 fire coils direct bypassing stock ignitors?

 

Nope. You can fire coils directly if you set it to FD mode and make some coil drivers (there is a common 3 PIN IC in a T220 case that is used...I just can't remember the part number) but the ECU can't by itself sink the current required to drive the coil.

 

is that how the fc stock ecu works? batch fire?

 

Stock ECU is sequential on the primaries, batch on the secondaries I believe.