Listen to the engine and the lifters, you can tell a lot by the noice or lack there off, take it for a spin, when driving at a good speed take hands of wheel and apply the brakes see if it stays straight or pulls to one side, drive at different speeds, feel how the car shifts. Smell for refrigerant inside and outside the car. Drive by a friend have them watch the tires, if they wobble, maybe a bad tire or rim. Many things to look for. Gun it and step on the brakes hard see how it does. Drive in reverse, see how it moves and listen to the transmission. Check for oil leaks from different areas of the engine, where the engine and transmission meet and underneath. Try all doors and windows. Try the airconditioner, wipers, emergency flashers, high beams against a wall to see if aligned, if weird, it maybe alignment or an accident causing the front on the car to be way out