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

Air/Fuel Mixture

CAUTION: Some models are equipped with a factory adjusted throttle plate position set screw. Never attempt to adjust idle mixture using this screw! Idle mixture is electronically controlled by the Powertrain Control Module (PCM), and is not adjustable. If an idle mixture problem is suspected, check oxygen sensor and injection system. SEE Computers And Control Systems/Testing and Inspection.