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

W/ Single Point Fuel Injection


The coolant temperature sensor, located in the thermostat housing, provides the logic module with information on engine operating temperature. This data, in conjunction with data provided by the charge temperature switch, permits the logic module to provide slightly richer air/fuel mixtures and higher idle speeds until normal operating temperatures are reached.