Detonation, Spark Knock

DEFINITION: A mild to severe ping, usually worse under acceleration. It sounds like popcorn popping.

Check for overheating problems:
^ Low coolant
^ Loose drive belt
^ Restricted air flow through radiator, or restricted air flow through condensor (if A/C equipped)
^ Proper cooling fan operation
^ Front air dam missing or damaged

Check:
^ Knock sensor circuit system for no spark retard during the knock condition
^ TCC operation (A/T only)
^ EGR operation

Remove carbon with top engine cleaner:
^ Check for poor fuel quality, proper octane rating.

Fuel with higher octane ratings may eliminate problem.