FixVault

Home › Mercury › 1995 › Villager GS, Van Cargo › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/O Codes › Symptoms › Spark Knock

Spark Knock

Check ignition system. See BASIC TESTING - 3.0L article.
Check for vacuum leaks.
Check EGR system. See SYSTEM/COMPONENT TESTS article.
Check cooling system for overheating.