Perhaps he's on to something Mike. Maybe the CPS generated too strong a signal and the ECU triggered the ICU to give out so much spark that the idle increased.
Maybe the ECU turned that extra strong CPS signal into super high fuel pressure along with a WOT signal from the TPS. He might be on to something. I'm tellin' ya!!!!
LOL, I was thinking more along the lines of miss fires and O2 sensor seeing too much fuel as a result, then adding more air, then not getting missfires ( as good CPS signal returns) and then idle goes up as a result (as CPS signal strength to the ECU comes and goes in late stages of failure), thus causing a higher oscillation amplitude in the idle speed, thus a wandering idle from say 1000 to 1200 rpm, higher peak idle, which I have seen all too often in Renix jeeps. Another possibility is the timing of the firing periodically could be off due to poor CPS signal strength, resulting in ignition firing being late and or early, which could affect the completeness of a burn, late timing perhaps, incomplete combustion, setting off an O2 sensor cycle seeing rich and responding with more air or less fuel, where the O2 sensor and CPS set up a vicious cycle of idle speed swings and O2 rich to lean to rich swings, and over reaction leads to higher average idle.
Process control is a funny thing how it can wander up and down when you disturb the equilibrium with a little bad data. When it gets bad enough the entire control scheme collapses and your engine dies, floods, and or fails to restart.
Rereading what he said:
"Granted it did eventually lead to NO Start. But it started out with sputtering.
Uneven RPM
High Start RPM."
His symptoms do sound like a dying CPS. Mine sputtered, had a wandering idle just before it died for good.
So back our OP? he started with the same symptoms, but is now just fighting a high idle IIRC. High idle is most likely (50% prob) a vacuum leak, 35% Prob a bad sensor (MAT, CTS) or too much fuel, from a leaky FPR of injector, and lastly a bad MAP (<5% prob) based on frequency of those parts failing and causing the problem.