Prowler V6-3.5L VIN G (1999)
Spark Plug: Testing and Inspection
Combustion Deposits
COMBUSTION DEPOSITS
A shiny yellow glaze coating on the spark plug insulator is evidence of metallic by-products of fuel combustion, caused by chemical additives in
certain fuels. Avoid sudden acceleration with wide open throttle after long periods of low speed driving. Spark plugs with combustion deposits can
be cleaned and reused.
