Can you help me read my plugs?

[The_Flash]

Allow me to simplify that last post. When tuning the idle A/F Mixture on cylinder 4 I was unable to enrich the mixture enough to obtain a consistent yellow colored flame in the combustion chamber. The cylinder would flash yellow intermittently and that would be accompanied by a pop from the exhaust. Turning the mixture screw out only slightly increases the frequency of said flash/pops.

As far as the cause there are a few possibilities. What makes the most sense?

1. Bowl fuel level sitting too low (float too high)
2. Too much variance in throttle plate sync (it was 4 cmHg from cyl 3 at most)
3. Air/Vacuum Leak
4. Pilot air jet not fully seated
5. Pilot/idle jet not fully seated
6. Cylinder 4 is cursed

The colortune guide suggests #1

[The_Flash]

So the culprit to the cylinder 4 misfire was a dirty pilot jet. Hard to believe that it was still clogged after being soaked and scrubbed but I put it back together and it tuned right up. Here's what the manometer looked like when I decided that I was done...



This was at 2000 rpm, it's easier to get an idea of where they are live since the bars jump around just a little bit.

Next step is the test ride