Symptom Checks

Check the following items:

• Check fuel delivery system. Go to TEST HB, step 1)  (Natural Gas models), or go to TEST HC, step 1)  (all others) under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article.
• Check EVAP emission system for leaks. See SYSTEM TESTS (EVAPORATIVE EMISSIONS) in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article.
• Sulfur content can vary in different fuels. Try a different fuel source.