Excessive Odors - Fuel, Emissions

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 Check Fuel
fuel in charcoal canister, Evaporative
fuel tank vent blocked, system
poor seal on gas cap Evaporative Emissions System

CCV valve plugged or stuck Check CCV system,
CCV hose blocked or plugged Positive Crankcase Ventilation

Contaminated catalyst Check for missing or worn fuel fillpipe restrictor

Incorrect Air-Fuel mixture Check Air-Fuel ratio, O2 sensor, perform injector balance test, inspect regulator operation (check vacuum line and return hose), check fuel pressure

Excessive Emissions Failed Emissions Diagnosis