Car has 72k, just got it in June and now I am hearing a ticking sound, even through the speakers. Car is very noisy on startup and will quiet up after car gets warm, getting a P21A0 (Cyl 5 air/fuel imbalance). took it to dealer and said it was normal, but sound it is much worse now. Going to put new injector, coil and plug in this weekend, but I fear the sound I am hearing is something else. Hoping the sound is the SC snout, anyone have a similar issue?