on my way to change my clutch earlier i filled up then 5 mins up the road suddenly the car let out a big backfire,then another... After that it started missing badly upon acceleration. Got to the garage,changed the clutch got back in started her up and 5 mins up the road its holding back under boost again with no backfires this time. It'll tickover fine and if i hold it at 5000rpm in neutral no probs occur. Im running hks fcd hks fcon fmic adjustable actuator set at 1 bar tubular manifold nightpager screamer ct9b have never had a prob with this setup for years.... why now? it was very cold and damp last night but thats never affected it before.. can anybody help please