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

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Air Flow Meter/Sensor: Service and Repair




1 Remove air flow sensor.
2 Center-punch plug in CO adjusting screw bore.
3 Drill a 2.5 mm (3/32 in.) hole in center of plug 3 - 4 mm (9/64 - 5/32 in.) deep. Clean up any metal shavings.
4 Screw in a sheet metal screw.
5 Using pliers, remove plug with screw.
6 Install intake air sensor. After adjusting CO level, install new concealment plug flush with air flow sensor.