2020 already has the linkages with the springs, and it’s not likely the spring is missing since it’s captured under the e-clip that holds the linkage together.Mine is a 2020 with the same cold start "rattlesnake". Has this issue as long as I can remember with about 38k miles on it now. As much as I hate taking a car back EVER, local $tealership dubbed it "normal" for an ecoboost. So should I be looking for missing springs?
Side bar:
You've seen me bust on $tealerships many times, however, although my trust in the instatution has been forever crushed, this does not mean I don't believe in individual techs and mechanics like yourself. Your and other's wisdom/EXPERIENCE is much appreciated here.