Spark/Vacuum Advance CTO Switch
I replaced the Motorcraft 2100 carb on my '78 CJ-7/304, today. I'm very happy to say that it no longer leaks fuel, it idles much better, and it accelerates very smoothly while in Park or Neutral. It still stumbles, however, when accelerating while in gear. (Mostly when cold, less when hot.)
After hitting the books to try and solve this mystery, I discovered that the Spark CTO switch has been removed, and the vacuum advance is connected directly to ported vacuum 100% of the time. Would this set-up cause a "stumble" on acceleration, or is this an acceptable alternative set-up? All the smog crap has been removed, obviously, and I guess the CTO went with it.
I understand the meaning of the word "obsession" much more clearly now that I own a Jeep.