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Elements and Performance Criteria

  1. Prepare to diagnose and repair mechanical fuel injection system
  2. Diagnose mechanical fuel injection system
  3. Repair mechanical fuel injection system
  4. Complete work processes
  5. Prepare to diagnose and repair mechanical fuel injection system
  6. Diagnose mechanical fuel injection system
  7. Repair mechanical fuel injection system
  8. Complete work processes

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Diagnostic tests must include:

cold-start enrichment inspection

cold and hot engine exhaust gas analysis.

Safety and environmental requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for working with high pressure petrol fuel systems

environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems.

Post-repair testing must include:

cold-start enrichment inspection

cold and hot engine exhaust gas analysis.



Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing mechanical fuel injection systems, including procedures for working with high pressure petrol fuel systems

environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems

operating principles of mechanical fuel injection systems and associated components, including carburation

application, purpose and operation of mechanical fuel injection systems and components, including:

fuel supply, including:

high and low pressure system

electric fuel pump

fuel accumulator

fuel metering, including:

air-flow sensor

fuel distributor

differential pressure valves

fuel injectors

cold-start enrichment and warm-up enrichment, including:

cold-start valve

thermo-time switch

warm-up regulator

auxiliary air device

full load enrichment

diagnostic testing procedures for mechanical fuel injection systems, including procedures for:

testing injectors, including:

opening pressure

leakage integrity

spray shape

chatter

testing system pressure, including:

primary system pressure

control pressure

analysing exhaust gas

repair procedures for mechanical fuel injection systems, including procedures for removing, replacing and injection pump timing mechanical fuel injection systems

post-repair testing procedures for mechanical fuel injection systems.