its got samco hoses they are fresh. by overboosting i mean thats what it feels like when you nail it its very slow unusually slower than all my mates rst's and when you hit 4000rpms the car stops pulling if you hold the accelerator down then the rev counter drops to 0 and the car doesnt pull as soon as you let the pedal go the dump valve kicks in and the car carrys on running. i have no lambda sensor on the car at all could you recommend one and where id get it from thanks alot lads any other ideas gotta be something stupid changed almost everything in past 4 years. plug gaps are 0.7 cheers