Visual Checks

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2011 Mercury Mariner, 2011 Lincoln Navigator L, 2011 Lincoln Navigator, 2011 Lincoln MKX, and 2011 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the air cleaner and inlet duct.
Check all engine vacuum hoses for damage, leaks, cracks, kinks, and proper routing.
Check the electronic engine control (EEC) system wiring harness for proper connections, bent or broken pins, corrosion, loose wires, and proper routing.
Check the powertrain control module (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 the quick test. Refer to QUICK TEST for additional information.