Been for a run in the car and once into 3rd gear revs about 4-5krpm there is a pop, momentary loss of power for like a second and then fine again.

Does not happen in first or second gear.

The pop and loss of power is like when your boost hose collapses or the spark is blown out.

Its running NGK BCR8ES plugs gapped I think at 1mm. I have new 071's to fit.

It has been sat out in the heavy rain for a few days and has a K&N cone filter and metal shield fitted under the bonnet vent.

Have changed the dizzy just recently for one that did not have a broken sensor mount but this was fitted to the same mark as the previous dizzy. Cap and rotor arm are both in very good condtion.

Just worried in case I break something (again ).