Bringing non-runner M1165A1 REV back to life!

[Mogman]

During the takedown process of removing the power steering reservoir, intake manifold, turbo crossover, etc I noticed some damage to the engine harness, including the main ground wire (3C) as well as the three wires to the TPS (Throttle Positioning Sensor). The TPS wires were severed completely. Would a disconnected TPS cause the rough idling in the video I posted above? Wondering if that's been my culprit all along...

Not likely, there is nothing electric about the engine but for the shut down solenoid.

 

[GMVguy]

Welp.... found the problem: https://youtube.com/shorts/oQPNdCx3f98?feature=share

Don't think there's a fuel additive that can fix this issue.

 

[Mogman]

unfortunately that is all to common