Tune-Up Notes

NOTE: When performing tune-up procedures described in this article, the following notes and precautions must be followed.

For Tune-Up purposes "Light Duty" refers to vehicles up to 8500 lbs. GVW. "Heavy Duty" refers to vehicles exceeding 8500 lbs. GVW.

If Dura-Spark 2-piece distributor cap must be removed, first remove top portion, then rotor, then bottom portion (adapter). If any spark plug wire is disconnected with this system, connection must be first greased with silicone grease before it is reattached.

When connecting a tachometer to Dura-Spark ignition coil, install the alligator clip on tachometer into the "DEC" (Tach Testing) cavity.

When connecting tachometer to SSI ignition coil, install the alligator clip on tachometer into the "DEC" (TACH TEST) cavity.

Due to changes and corrections, always refer to Engine Tune-Up Decal in engine compartment before performing tune-up. If manual and decal differ, always use decal specifications.

Do not allow or create a condition of engine misfire in one or more cylinders for an extended period of time. Damage to converter from overheating may occur due to loading with unburned fuel.