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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Fuel System: Overview

OVERVIEW
The alternative fuel system consists of CNG or LPG fuel tanks, a fuel filter, an LPG vaporizer/regulator, a CNG high pressure regulator, a combined metering valve and sensor assembly called a Compuvalve, fuel shutoff solenoids (LPG), an Alternative Fuel Control Module (AFCM), a manual fuel shutoff valve (CNG Contour), a gaseous fuel distribution manifold (Contour), an adjustable tuning tee, fuel rails, fuel injector sleeves, an ALT/GAS switch, an ALT/GAS switch light and an ALT fuel relay module.