I have noticed my 2009 has done the same thing over the years. I suspected valve seals in the past. With my older Gen 1 Mustangs, this was a clear indicator of valve seal wear. Now I understand this is a "normal" start up. I feel soooo much better.
Have a Coyote swap planned for my ‘09. Originally, I was going to supercharge my 4.6L. Then a friend turned me on to the Coyote. I did some research and talked to a few folks I met from Ford -Dearborn and made an amazing discovery. What an incredible engine! If you tune it for a truck, it’s a...