Hello I have a RHD 1993 FD3S
that I have just picked up about 2 weeks ago, I'm new to the rotary life but know mostly only maintenance wise so I'm having trouble with this.

I changed my exhaust to a HKS Hi-Power

After install, my rpms started hitting 600-850 for a few seconds then the car dies/stalls out.

We checked the vacuum lines behind motor, a check valve was broken, so we replaced it.

The problem was still there but it stills stalls out after a while.

I also have a Apexi Power FC, but no idea how to use it or tune it, so basically its on the original mapping I'm guessing.

Also I do not know what these other 2 ports are? or where they lead to..

 

First off don't be hooning the car around on the Apexi base map, get it mapped ASAP.

Check your MAP sensor vac line.

 

Is there a tutorial/thread on how to map an apexi fc?
Sorry, I'm really new to this!

I'll be checking my MAP line right now