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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Pinpoint Tests

PINPOINT TEST A: LOSS OF POWER

Normal Operation
The exhaust system provides an exit for exhaust gases and reduces engine noise by passing exhaust gases through the catalytic converters and a muffler assembly. If the exhaust system becomes restricted a loss of power can occur.

Possible Causes
A loss of power can be caused by:
^ restricted or damaged pipes.
^ muffler.
^ catalytic converter.

A1-A3: