Excessive Odors - Fuel, Emissions

SYMPTOM:
Vehicle has excessive "rotten egg" smell. Raw fuel (gasoline) can be smelled. Excessive odors do not necessarily indicate excessive emissions.

POSSIBLE CAUSE ACTION


Faulty purge valve, liquid fuel in carbon Check Evaporative system
canister, fuel tank vent system blocked, in "Testing Procedures"
poor seal on gas cap


PCV valve plugged or stuck Check Positive Crankcase Ventilation (PCV) system in "Testing
PCV hose blocked or plugged Procedures"


Contaminated catalyst Check for missing or worn
fuel fillpipe restrictor


Excessive Emissions Refer to High Emission Levels
in "Diagnosis By Symptom"