Fitted the new engine in the car during the week and everything is working as it should, this engine has higher compression then the previous one and in better condition. I'm getting full boost around 700 RPM sooner then the old engine and the wastegate spring now lets the car boost .75 where as before it would only boost .6 bar The only problem I had was the knock sensor and it was causing the car to pull itself back at 2,500 rpm and was throwing the engine managment light, fitted a new one and tried to clean as much dirt out of the threads on the engine and engine management light went off. I reset the ECU and drove for 100km's and tonight took it for a blast and the car felt sluggish and holding back big time on boost as if the knock sensor was out again. If I go 50% throttle the car pulls harder then 100% throttle. I had the timing slightly retarded to be on the safe side and slowly advanced it and it still won't take boost, the car is actually slower at 1 bar then it is at .75 bar. Any ideas what's wrong with it? Still shit stuck in the threads in the knock sensor??