Chart 9
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2009 Mercury Mountaineer, 2009 Mercury Milan, 2009 Mercury Mariner, 2009 Mercury Grand Marquis, and 2009 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
- Spark Knock
NOTE:
Carbon Build Up In The Combustion Chamber And On The Back Of Valves Can Be A Contributing Factor For Engine Spark Knock Concerns. Remove Carbon Deposits Prior To Any Component Replacements.
Symptom Chart
| System/Component | Reference ( Pinpoint Tests - Gasoline Models Unless Noted) |
|---|---|
| Verify The Engine Operates At Normal Temperature | Visual. Refer To The Appropriate Cooling System Article Or no Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index To Diagnose Any Cooling System Concerns That Are Present. |
| Verify Correct Coolant Level And Coolant Concentration | Refer To The Appropriate Cooling System Article For Correct Coolant Concentrations And Fill Procedures. |
| Maf Sensor | Go To Pinpoint Test DC . |
| Base Engine | Refer To The Appropriate Engine System Article And Carry Out The Inspection And Verification To Continue Diagnosis. |
| Fuel Delivery System | Go To Pinpoint Test HC . |
| Secondary Ignition System | For Vehicles Equipped With A Coil Pack Ignition System, Go To Pinpoint Test JC
. For All Others, Go To Pinpoint Test JB . |
| PCV System | Go To Pinpoint Test HG . |
| Engine Oil Quality | Visual |
| Additional Testing | Go To Pinpoint Test Z . |