Excessive Exhaust Emissions/Odors

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 Evaporative emission system.
fuel in charcoal canister,
fuel tank vent blocked,
poor seal on gas cap.

PCV valve plugged or stuck Check PCV system.
[1][2]PCV hose blocked or plugged

Contaminated catalyst Check for missing or worn
fuel fillpipe restrictor

Incorrect Air-Fuel mixture Check fuel pressure.
Check O2 sensor.
Perform injector balance test (MPI).

Excessive Emissions SEE Powertrain Management/Computers and Control Systems/Testing and Inspection/Procedures.