Good Morning.
I am hopeful that you all can lend me some guidance with what I believe is a problem. I recently had a new engine installed in my car, abut 600 miles ago, and it is running fine. However, the fuel economy is down approximately 20% on the first two tanks of gas.
I had the TSB for the PCV performed years ago and when they swapped out the engine they changed everything over appropriately as far as I know. At idle, the PCV systems appears to be making a considerable amount of noise. I can place my hands over the end where it meets the valve cover and it muffles the noise dramatically. I took the car back to the dealership and told them about the dramatic decrease in economy and also the noise. They tested the PCV system and said that it was functioning properly and the noise was normal. They could not account for the decreased fuel economy either.
I made a video with my phone and tried to upload it, but the format in which I made the video is not compatible. I did attach a picture to illustrate that area where I place my hand that muffles the noise.
I would appreciate any suggestions that you all might have.