Occasional misfire

[Robsheffield]

Hi guys, im thinking possibly something to do with Vacuum Sensor or Vacuum lines to the distributor - any other ideas?

comes and goes and seems to only be under load, occasionally i can clear it by gently revving with the clutch down, other times it wont go.

Feels like its only firing on 3

[Robsheffield]

Top banana, sorted, a tiny bit of water was in fact down there

Now its dried its perfect