I have a brand new 2020 Navigator with only 400 miles and it just started making a loud chirping sound in the engine. The dealer said it's "normal when it's cold" and coming "from the high pressure fuel pump" ---- I don't accept that answer on a vehicle that cost this much money, and DIDN'T make that noise when it was cold a few weeks ago when I bought it. Temp was around 32 when it makes the noise. I went to another dealer, and looked at a new 2020 they were tyring to get rid of, started it up, it was around 30, and there was no chirp. I uploaded a video, hoping it works and someone might have an idea. Any advice appreciated! (in case video attachment doesn't work, I uploaded to YouTube, hope I am allowed to post the link :
20210127_162042_1.mp4