The turbo PT is a port injected motor. I would think an air leak at the throttle plate could cause a slight hesitation at times, or maybe a variation in idle speed, but it would not have the major problems the old carb fed slant 6 experienced from a throttle shaft bushing leak. The turbo computer measures the o2 levels in the exhaust, and also measures the air flow through the intake system and monitors & adjusts the fuel mixture at the injectors in the intake ports continuously. If the computer doesn't like the numbers it sees, it will set a code, light the check engine light, or shut down and go into limp in mode. The first two could happen pretty fast. the last one usually takes a while.

At the mileage on your car, I would expect issues with the TPS switch or vacuum hoses causing a problem before the throttle body, but if you have known problems with the throttle body, I'd probably replace it. Gene