I went thru the same thing when I bought mine! The guy "claims" he didn't know much about it & hardly ever drove it or done anything to it in a two year span. When I got it home, it was all jacked up. Things unhooked, stuff not working, missing parts, etc... Luckily I got a good deal on it & it was low mileage. But Ive literally put my hands on everything on the car & replaced or fixed as Earlbrown mentioned. Now it's running a whole lot better. Sucks cuz it took me a few months, but u gotta do it.