Exhaust System Backpressure
WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 1997 Ford RV Cutaway, 1997 Ford Pickup, 1997 Ford F-Super Duty, 1997 Ford Econoline, and 1997 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Connect scan tool. Start and run engine until a temperature of 170°F is reached. Disconnect engine oil temperature sensor. Run engine at wide open throttle and monitor EBP PID on scan tool. If pressure exceeds 28 PSI at 3400 RPM, exhaust system is restricted.