'86 325e, stock with an Ansa cat-back.
I've been chasing this issue for nearly a year now and I finally threw my hands up and decided to post.
At higher RPMS, my engine emits a high-pitched whistle. I have no vacuum leaks, my intake boot is fine and I have replaced all of my intake manifold gaskets. I will note that this issue presented itself the same day that my exhaust was installed.
It's starting to really wear on me so any advice would be great. Thanks in advance.
I've been chasing this issue for nearly a year now and I finally threw my hands up and decided to post.
At higher RPMS, my engine emits a high-pitched whistle. I have no vacuum leaks, my intake boot is fine and I have replaced all of my intake manifold gaskets. I will note that this issue presented itself the same day that my exhaust was installed.
It's starting to really wear on me so any advice would be great. Thanks in advance.