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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Ignition Timing: Adjustments

The base timing is preset when the engine is manufactured, no adjustment is possible.* Timing advance and retard are accomplished through the powertrain control module (PCM) with ignition control (IC) and knock sensor (KS) systems.


*Ignition timing can be changed by reprogramming the PCM using Techline Information System 2000 (TIS 2000) PC, and the Tech 2 scan tool.
Please contact dealer for necessary updates and procedures.