i have been having some problems the last month with my astra 2.0 turbo coupe. after it has run on boost for a short period of time i find i'm experiencing flat spots around 3000rpm in all gears. this problem only occurs after the pushing the car at high revs. i have askd about and other astra owners have said it could be the MAF meter. has anyone else had this problem? i have also had issues when the engine is idle with the revs droping and almost stalling the car.. initially i though this could be a problem with the spark plugs. due a service in the next 3 months but would like to right any wrongs first before letting vauxhall loose on it.... any ideas???