No, it depends on the quality of spark they are producing - it's harder to ingnite fuel on boost (higher pressure, richer mixture etc)...so it could be fine during during low rpm operation. Best bet is to borrow someones coils that are known to work and see if they fix the problem.
If this doesn't work, i suggest taking it to your tuner and get him to have a look at the ecu map.
Also check you didn't dislodge/damage any wires when you took your gearbox off. Not sure what could cause this that runs near the box though.