Just need some advice.
So, I've replaced all my motor mounts, car is tuned up, replaced fuel filter etc, but in cold weather my focus likes to vibrate, not significant, but enough to make the hatch rattle, and is buzzy pushing the gas when only driven for about 10 min. Wondering what else this could be, or is this normal? And as long as I've had the car, when I first crank her up, I can hear the valves chattering, kinda sounds almost like a slight knock, but goes away after about a minute of running. Annoyed by these little things. If anyone has any insight I would greatly appreciate it. Thanks
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