RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
To prevent possible pre-ignition and/or mechanical engine damage, the correct type/heat range/number spark plug must be used.
Always use the recommended torque when tightening spark plugs. Incorrect torque can distort the spark plug and change plug gap. It can also pull
the plug threads and do possible damage to both the spark plug and the cylinder head.
Remove the spark plugs and examine them for burned electrodes and fouled, cracked or broken porcelain insulators. Keep plugs arranged in the
order in which they were removed from the engine. A single plug displaying an abnormal condition indicates that a problem exists in the
corresponding cylinder. Replace spark plugs at the intervals recommended in Lubrication and Maintenance
Spark plugs that have low mileage may be cleaned and reused if not otherwise defective, carbon or oil fouled. Also refer to Spark Plug Conditions.
CAUTION: Never use a motorized wire wheel brush to clean the spark plugs. Metallic deposits will remain on the spark plug insulator and will
cause plug misfire.
IGNITION COIL CAPACITOR
One coil capacitor is used. It is located in the right- rear section of the engine compartment.
The coil capacitor(s) help dampen the amount of conducted electrical noise to the camshaft position sensor, crankshaft position sensor, and throttle
position sensor. This noise is generated on the 12V supply wire to the ignition coils and fuel injectors.
SPARK PLUG CABLE
Spark plug cables are sometimes referred to as secondary ignition wires, or secondary ignition cables.
The spark plug cables transfer electrical current from the ignition coil(s) and/or distributor, to individual spark plugs at each cylinder. The resistive
spark plug cables are of nonmetallic construction. The cables provide suppression of radio frequency emissions from the ignition system.
