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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Air Flow Meter/Sensor: Service and Repair


1. Remove air flow sensor.
2. Drill hole in plug with 2 mm diameter drill bit until bit bottoms against steel insert.
3. Pull out plug with suitable easy out tool or equivalent.
^ A sheet metal screw and pliers may be used to pull out the plug.
4. Install air flow sensor, then adjust CO value.
5. Install new plug in mixture adjustment screw bore so that plug is flush with air flow sensor.