... or maybe its haunted? I know mine is.

My car only ever acts up after I start to talk about trading it in. These babies have personalities, y'know! To fix - talk to the old girl, tell her you're not gonna trade her, and it'll be fine! She'll fix herself.
(Trust me, that's not the worst piece of advice you'll find on these boards. I've solved several mysteries by praying to the car gods! )