System components

SYSTEM COMPONENTS

The G.M. ACG MULTEC-XM injection-ignition system is made up of four interdependent circuits:

A Fuel supply circuit
B Air intake circuit
C Electric/electronic circuit
D Circuit for checking harmful exhaust emissions

Devices and associated circuits strictly connected to the injection-ignition system are also present. These are also designed to reduce noxious vehicle emissions in line with USA '83 standards and are as follows: fuel evaporation control and vapour recovery circuit; crankcase vapour recirculation and recovery circuit; exhaust gas recirculation system (E.G.R.).

A. FUEL SUPPLY CIRCUIT

This consists of the following parts:

1. reservoir
2. pump submerged in tank
3. mesh prefilter on pump intake
4. paper main fuel filter
5. outlet line
6. four injectors
7. fuel pressure regulator
8. return line with one-way recirculation valve or anti-reflux valve
9. vacuum point for fuel pressure regulator
10. inertia safety switch