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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Controls - Symptom Charts - (Hybrid)) >> No Diagnostic Trouble Codes (DTCs) Present Symptom Charts >> Chart 17

Chart 17

WARNING: This page is about a different variant/trim than selected.

- Exhaust System Concerns: Odor (Sulfur or 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 catalyst) are likely to have a sulfur smell due to the highly active state of new catalysts. Installing a new catalyst may actually make the symptom worse.
EXHAUST SYSTEM CONCERNS: ODOR (SULFUR OR ROTTEN EGG SMELL) - SYMPTOM CHART

SYSTEM/COMPONENT REFERENCE
Check for any driveability or exhaust smoke symptoms GO to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX  for direction to repair other symptoms.
Fuel Delivery System GO to PINPOINT TEST HC .
EVAP System CHECK for EVAP system leaks. REFER to EVAPORATIVE EMISSIONS .
Fuel Source Talk with the customer. Since sulfur content can vary in different fuels, suggest trying a different fuel source.