Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Ignition Timing: Adjustments

NOTE: Base (initial) ignition timing is NOT adjustable on this engine. Do not attempt to adjust ignition timing by rotating the distributor.

All ignition timing functions are controlled by the Powertrain Control Module (PCM). The DRB scan tool may be used to verify base timing and electronic timing advance. Refer to the appropriate Powertrain Diagnostics Procedure for operation of the DRB Scan Tool.

Fuel synchronization can be verified and set by rotating the distributor. Refer to the Distributor Removal/Installation, Checking Distributor Position.