xtinctbird

So today I find a 98 formula at a dealership here that has 89,000 on it. the price is 7995. My wife wants me to trade my 94 ta in on it but who knows. What are some potential probs I should look for? The car is making a steady light knocking that seems to be coming from some black sensor thing that connects into the back of the throttle body. A possible concern? Oh yeah what's the dif between a formula and a ta in 98.