Isn't it nice..

[RetroPug]

Thanks Janne

I've popped some NGK BKR6EZ in, reset the ECU, warmed up for 10-15 mins on the drive then given it a 20 minute run at different speeds. It seems better, but still the whisperish exhaust gas - Having a mooch earlier, there seems to be quite a bit of liquid (water maybe) dripping from the exhaust.

Re the metallic sound goes away after about 5mins.

Gonna have to take it to the garage me thinks

BKR6EK are the correct NGK spark plugs.