Miscellaneous Component Or System Checks

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, 2003 Lincoln Town Car, and 2003 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

Check the following:

Check fuel and ignition systems. Go to TEST KB, step 85) (LS and Thunderbird), or go to TEST A, step 1) (all others) under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - CNG, FLEX-FUEL & GASOLINE article.
Check exhaust system for restriction. Go to TEST HF, step 1) under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - CNG, FLEX-FUEL & GASOLINE article.
Check engine mechanical condition. Check compression, camshaft, valve train components, etc. See appropriate article in ENGINES.