Hi, my Maestro Turbo pops quite a lot on overrun, I'm not sure if this is just a case of how they were, as I've never had one before. It does have a straight through exhaust which I'm guessing doesn't help mask the fact. It seems to smell quite rich too, but again I'm not sure if this is normal of the time. I'm just working my way through stuff. Would like to confirm what the correct plugs are and gap if someone could help me eliminate that please and any other things to check would be great. Thanks In advance.