Ok, potentially overthinking this but when running speed density the ECU needs to know what the MAP sensor output is. The rom to use on JDM cars is EDM (9653 v7 SD) and from what I read EDM 8's do not come with a MAP sensor standard. You'd assume their roms had no code for using the MAP sensor output in the sub routines since no sensor was fitted to the cars. When the guys made the 9653 SD rom, they would had to assign a pin/ram address for MAP sensor input...

So my question is to which pin do you connect the MAP sensor 0-5v output when using the EDM rom (96534706) on a JDM 3 plug ECU?

 

Map sensor has 3 lines
- 0-5v pin #42
- ground
- output pin #92

 

Brilliant, I am using pin 92 already for logging. Thank you sir.