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It's definitely not normal. This is a split second delay when you stab the throttle quickly.
Would make heel and toe very difficult on track the way it is.
Usually the rectifier diodes which convert the current from AC to DC, when they go bad they act like a two way valve and allow current to back draw.
Can actually see some big amp draws with a thermal camera.
As above.
With most of the codes being related to abnormal voltage, i'd start with the alternator and battery.
Do you know how old those codes are by checking the freeze frame data? They could be old.
Assuming you're looking at the dampening crank pulley, the one the aux belt runs off?
Get one if it looks rough.
As for the actual Megane pulley, it's debatable how much protection it actually gives as it's not that strong of a key. It also makes the timing process a little different in the...