Hello I have the problem that my engine in idling gives a very high frequency whistle of itself. If I give then a little more gas then it is still there, but is overcome by the engine. Furthermore, I also have power losses. Sometimes it pulls better and sometimes worse. In addition, I hear a gap between 1000 and 1500 rpm. Maybe this can also be connected with it. But the clapping occurs only when driving. If I give gas, then everything is normal. W ar was yesterday at the friendly one and he has once removed the cat to check whether the is defective. But everything (also shock absorbers and turbo lines) ok. . Could the pipe and the power losses from the suction bridge ( change seal costs approx. 160 Euro ) come ? Time to compare : I almost drove a 90 HP gulf away !!! I want to fix this as soon as possible and have no rest. I hope that someone can help me there.