I have a 94 Eldorado Touring Coupe with a bad computer and it is said to be leaking from the top of the oil pan. The car runs but going into gear it shifts very hard and the rpm gauge jumps around alot. The rpms dont jump around but it does idle kindof high and the fuel gauge always reads empty. I've heard there is more than one computer in the car so which one is the one causing me problems? Is the oil leak worth getting fixed to sell the car or should I just sell as is?