Chart 20
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Lincoln Navigator L, 2011 Lincoln Navigator, and 2011 Lincoln MKZ. However, it is still accessible from the selected car via links, so may be relevant.
- 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 appropriate service information to continue diagnosis.
SYMPTOM CHART - ENGINE NOISE (UNDER HOOD)
| SYSTEM/COMPONENT | REFERENCE (Pinpoint Test unless noted) |
|---|---|
Secondary Ignition System
|
For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC
. For all others, CHECK the condition of the spark plug boots. |
| Turbocharger System | REFER to the appropriate FUEL CHARGING AND CONTROLS article - Turbocharger to diagnose the turbocharger noise. |