Symptom Checks

Check the following items:

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