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)

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Engine Speed Sensor: Service and Repair


1. Disconnect battery ground cable and remove air cleaner.
2. Disconnect electrical connector and vacuum hoses, if equipped, from sensor.
3. Remove clamp securing speed sensor to engine.
4. Remove speed sensor.
5. Reverse procedure to install.