Excuse me, does it mean that it is good to open the membrane inside the waste gas valve?

Hello! The wastegate valve is a plastic part above the engine. If it is broken, the leather cups inside are generally rotten. Everything was fine when driving, but the car shook badly when parking.

Better test it. I'll tell you a good way to see if there is oil in the throttle.

1, that is, unscrew the clamp at the throttle door, and then turn the trachea left and right to take it off. Then wipe the calipers from which the oil is pumped with paper towels for later use. The operator first puts the throttle under the net with his fingers, then holds it steady with his other hand, and the throttle opens. Then, use a dipstick to probe into the lower hole and take it out to see if there is oil on it. If it's putty, take a look.

2. If you are under warranty, go to SSSS. Although your waste gas valve didn't hear obvious air leakage, you can say that there is oil in the throttle, because the general maintenance personnel will advise you to replace the cover assembly when checking that there is oil in the throttle, and those with warranty can be replaced free of charge.

If there is no warranty, I suggest you replace it quickly, because the air leakage is audible, which means it is more serious.

I hope it helps you, thank you! Hope to adopt!