I have mk3 vr6 golf 1997 and it hasn't been running right for a while, need help urgently!! What happens is she pulls through to 3000 rpm normally and then struggles once passed. The car also sound like it has a blow from the exhaust. I know it not the exhaust, I have also changed the Lambda sensor and maf, and given it a full service. I have the car on a vag com and there are no fault codes since I changed the lambda sensor. Help me please I used to love this car and now just want rid!