Bad ESC Module?

[ninety6]

I'm working on my 86 C10 305, and it has ESC.

Hadn't run in at least 3 years, just sat on my uncles farm in a field...

I brought it home, and here's where i'm at:

With ESC hooked up, it cranks and cranks, but no spark (visual spark test while grounding plug) no start, etc.

I bypassed the ESC module by jumper green to black on the ESC connector, and it started up IMMEDIATELY on the first crank. It runs a little rough at low RPM, it cut out a couple times, but i was able to drive it up and down the driveway and keep it running.

Is it a fair assumption that the ESC Module needs replace? I don't intend to bypass permanently.

Also, i'm running 3 year old gas (gotta do something about that), so i'm sure that doesn't help.

I just wanted to know if a bad ESC module can cause no spark, and its safe to assume that a need a new one? Or, could the knock sensor or whatever cause that with a GOOD ESC module?

THanks for the tips. I was SO excited to get her running! I need to hurry up and start my projecte thread to track my progress!