Practice question

When servicing an EFI fuel injector that is suspected of being clogged, the recommended approach is to:

  1. Drill out the injector orifice
  2. Test flow/spray pattern and clean ultrasonically or replace per manufacturer guidance
  3. Increase fuel pressure beyond spec
  4. Run straight solvent through the engine

Answer: B — Test flow/spray pattern and clean ultrasonically or replace per manufacturer guidance

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