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 Injection: Testing and Inspection

If no air (oxygen) flow enters the exhaust stream at the exhaust ports, HC and CO emission levels will be too high.
Air flowing to the exhaust ports at all times could increase temperature of the warm up 3-way catalytic converter. Refer to Computers and Controls / Flow of Diagnosis / Chart C-6. Testing and Inspection