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 logical successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la
Knock Retard
The display indicates the number of degrees the
Electronic Control Module (ECM) is retarding the
Electronic Spark Timing (EST).