G'day mate, its probably incorrect to say losing boost, but when the engine gets to temp, from 2500 - 3000rpm onwards, anything over quater throttle and she starts popping, (similar to the sound of over fueling) and losses huge power. I serviced the solinoid today also cleaned the throttle body, put a meter over the coils and resistance was reading fine on all 6. however I did take out the spark plugs and cleaned em and chucked the feeler gauges on em, algud, except yes they were all quite white in colour, silly me thought the mixture was lean and went off on a tangent. ive got a little power increase today but not 100% Thanks mate, I'll take your words of wisdom and go grab sum new iridim plugs. I'll be sure to reply either good or not so good news. cheers again.