Tune-Up - V8: Adjustments: Distributor

Engines with carburetors are equipped with Delco-Remy High Energy Ignition (HEI) systems which use an integral coil and module. No adjustments are required.

Engines with throttle body injection (TBI) are equipped with Delco-Remy High Energy Ignition with Electronic Spark Timing (EST). The EST system consists of distributor module, electronic control module (ECM), externally mounted ignition coil and connecting wires. No centrifugal or vacuum advance is used on engines equipped with EST.

Fig 1: Firing Order & Timing Mark (Magnetic Timing Pick-Up Is Located At 10 Degrees ATDC)