One problem related to engine exhaust system has been reported for the 1996 Ford Thunderbird. The most recently reported issues are listed below.
Engine check light on, dealer replaced mass air flow sensor. Returned to dealer 4 times for gas mileage down 10-20%, low idle and stalls, poor driveability - Ford and dealer state car is normal - all data from purchase date available - clearly shows negative change at time of part replacement.