Ryan2412
New Member
I have an Audi A4 b8 2.0 Tfsi. I had an advisory on my MOT certificate to say it had a small oil leak and upon checking it was coming from the brake vacuum pump. We took the pump off and replaced the seals which did indeed fix the leak, however when we started the car we noticed that there is a strange rattle type sound that happens when the car is coming down from its rpms. If you Rev the car it sounds fine, it only makes the sound when the RPMs are dropping, does anyone know what it could be and if it sounds like it could potentially be the vacuum pump that we took off? Thanks in advance to anyone who may know the problem.