Thanks for the replys i'll have to check the hoses then. I'm not sure what the gap on the plugs are supposed to be lol has anybody got that info for me, I was told the plugs came already gapped correctly for the car as for overboosting i'm not sure when is missfires back fires it stinks of petrol but carn't find any evidence of fuel anywhere dont really know much about these motors so not 100% what overboosting is, what cud cause overboosting ??