I have a 1993 Mk3 2.0 16V and there is a problem when the revs get in a range of 26,000 - 30,000. It feels like the engine is cutting out. Almost like one of the plugs stops firing while in that range. If I accelerate or decelerate, it will go away, until I get back into that range. It has an un-even idle as well. *** Most important, it seems to only do this when it rains, which in the UK that's a lot. Has anyone else had problems like this, and if so, how was it fixed?