I have a 94 3.2 V6 that I just picked up at an auction. When I bought it, I changed the plugs, air filter, PCV, fuel filter and wires. Couple of issues that have recently come up are: 1.)It has a slight hesitation when I start off the line, 2.) running very rough and loss of power with a significant drop in gas mileage. I have an idea after reading about this that the first problem could be the timing belt and the second the oxygen sensor. Not sure how many 02 sensors their are and how to figure out which one it is. For the timing belt, I would rather not mess with it and take it to a shop to have fixed. Shop qouted me $350.00 to cchange the timing belt. Any thoughts if this diagnosis sounds right? She has 106k on her and as far as I know neither has been done to the car.