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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 15

Chart 15

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- Engine Noise (Under Hood)

NOTE: Attempt to identify the source of the noise. If the noise is from a source other than those listed below, refer to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX  (for noise such as spark knock) or the applicable Workshop article part.
ENGINE NOISE (UNDER HOOD) - SYMPTOM CHART

SYSTEM/COMPONENT REFERENCE
Secondary Ignition System
Snap noise that may be due to secondary ignition arcing.		 CHECK the condition of the coil-on-plug (COP) spark plug boots.
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