Visual Check

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Ford RV Cutaway, 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the air cleaner and inlet ducting.
Check system wiring harness for proper connections, bent or broken pins, corrosion, loose wires, proper routing, etc.
Check the PCM, sensors and actuators for physical damage.
Check the engine coolant for proper level and mixture.
Check the transmission fluid level and quality.
Make all necessary repairs before continuing with Quick Test.