Wow! that's a terrible vid - he says the intake (part you straightened up & reset) for the manifold vacuum line goes to ventilation!!! It hooks to the intake outlet to get vacuum to move the sllde diaphram (under the top cap).He also says the choke (FEV) is variable- not true- it works one way only-it starts out (cold) retracted (large fuel orfice,small airway) & then extends as the motor/FEV heats up to expose the normal fuel inlet at the needle jet.This is done by providing voltage to the FEV from a resistor block (usually 1 or 2 tan porcelin block/blocks), the voltage heats it up and makes it extend, once extended it won't retract till it's "cold" again. If the FEV doesn't extend (due to being burnt out) too much fuel not enough air to feed engine properly.
It's possible that the vacuum inlet diaphram could have been causing your issues- if it wasn't functioning then the large diaphram (throttle slide) wouldn't move correctly(pulling the slide up to meter more fuel/air mixture @ 1/4+ throttle to WOT.
I'm going to say the FEV (fuel enrichment valve/choke) isn't working.remove the 2 screws and pull it out. Note the amount of the plunger exposed, turn on the ignition (or apply a power source), wait a few minutes and check for the plunger to have extended about a 1/4". If no change in the plunger- check wires going to the FEV,use a test light or volt meter to verify voltage is present.If voltage checks out then FEV is bad. If no voltage, keep following wires and checking connections to the ignition.
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