This could be a number of things including what you mention of a vacuum leak. So we need to start from the beginning and follow this guide and check these things off the list so that we can get more info to point us in the right direction.
https://www.2carpros.com/articles/symptoms-of-low-engine-power
Also, here is a guide that will take us through how to check for a vacuum leak:
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
Once we know if anything turns up with this info then we will have a better idea. However, if you can get a video of the noise so that we can see if that triggers any other ideas. Thanks
SPONSORED LINKS
Wednesday, December 2nd, 2020 AT 2:47 PM