You went from breathing through a corrugated straw to a wide open pipe. It’s gonna freak until she gets (if she can with the stock tune) used to it.
usually she will either throw a code right away or by 50-100 miles. Different sequence of tests are completed at different mileage (engine hours)...
While I agree point was do we know for sure there isn’t a delay? I seem to want to say they mention something about it in the manual as well. If willing a quick test with rev matching disabled should be able quickly answer the question.
a secondary follow up would be temps. Are you jumping on...
What state was the vehicle last in? Oh, wait, I mean was the radio on when you turned it off? Argh, was the radio left powered on when you turned off the vehicle?
Is it defaulting to am/fm or hd radio or is it defaulting to sat/CarPlay/android each time you get in?
Does rev matching cause a delay with overly aggressive up shifts or is it polite enough to get out of the way if you are quicker?
I have noticed when rev matching is enabled you can simply tap a gate to goose the throttle. Coast along in neutral and just lazy tap a gate but don’t go fully into...
One way to check to see if what you are hearing is resonator related. As long as you are able to replicate the sound on demand try to replicate it on a vehicle with the resonator delete option installed.
Out of curiosity, are your airbox lids secure and sealing properly? I noticed in the other thread it kinda looks like the new replacement air filters make the airbox bulge on the far side.
edit: acknowledged the boxes have a slight form to them.
Harness makes me think of that other thread that mentioned something about unshielded right side. Gonna see if I can locate it real quick.
edit: add link to mention.
https://www.mustang7g.com/forums/threads/service-soon.158485/post-3235723
Thx, I’ve also noticed ours seems to drop in place smoother when left unlatched during closing. Tbh though really haven’t spent enough time back there looking for potential issues.