If you want to learn how things actually work...

[86boy]

if you have any actual documents explaining specifics (not owners manuals/service manuals/repair manuals) please share.

here's a few.

IACV (Idle Air Control Valve)

http://www.testroete.com/car/Toyota/mr2 ... rol/07.pdf

Ignition System

http://facultyfiles.deanza.edu/gems/wal ... nition.pdf

DLI (Distributorless Ignition System) for the 4agze/7mgte
The original site was took it down...unfortunately.
http://www.autoshop101.com/forms/h23.pdf

now idk if this is ok or not.. so tell me/remove this link. I saved it when they shared it via a PDF file.

https://www.dropbox.com/s/na8frbxq4gxm0k1/h23.pdf?dl=0

[dr.occa]

Cool beans Chris