Bill, the EZ-117K Ignition System diagram you have posted is functional, whereas (label 217) is the ECU in the footwell on the passenger side behind the kick panel. The EZ-117K module (label 260) is on the driver's side and up...you need to remove the bolster panel, remove and look up and to the right of center...there it sits in a cradle (with a pink or blue label) to the left is another module which is the ABS module. I suggest not to overthink the situation at hand, changing the CPS is prudent and not too expensive, BUT I support using either Bosch or an OEM Bougicord. The failure of the CPS is common, time and wear predictable, I use the Bougicord and ALWAYS carry a NEW extra with me. The idea of a governor is a rabbit hole I will step back from at this time.
I will impress upon you to learn about the resistor pack (they rust, impeding current) that powers the injectors located on the inside of the engine compartment driver's side near the ignition module (label 419) that are also prone to wear out or cause a fuss from heat, vibration and if the thermal paste dries out between the aluminum base (heat sink) and the ignition module causing intermittent bad behavior. There is more, but I will step back and give you time to think, look, find and ponder.
No Saws All needed.