Chart 22

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

Exhaust System Concerns

Odor (Sulfur, Rotten Egg Smell)

NOTE: A slight sulfur smell may be normal. Catalysts with less than 8,000-16,000 kilometers (5,000-10,000 miles) (new vehicle or replaced catalyst) are likely to have a sulfur smell due to the highly active state of new catalysts. Replacing the catalyst can actually make the symptom worse.

SYSTEM/COMPONENT	REFERENCE ( PINPOINT TEST - CNG, FLEX-FUEL & GASOLINE ) unless noted
Check for any driveability or exhaust smoke symptoms	Refer to STEP 2: NO DTC(s) PRESENT SYMPTOM Chart INDEX for direction to repair other symptoms.
Fuel Delivery System	Natural Gas Applications: GO to B: Natural Gas Fuel Delivery System STEP HB1. All Others: GO to C: Fuel Delivery System STEP HC1.
EVAP System	GO to X: Evaporative Emission (EVAP) Monitor and System STEP HX14.
Fuel Source	Talk with customer. Since sulfur content can vary in different fuels, suggest trying a different fuel source.