Practice question

A school bus diesel has hard starting when hot but starts fine cold. Considering the fuel system, the technician should suspect:

  1. A frozen fuel filter
  2. A discharged battery only
  3. A worn tire
  4. Hot-fuel handling issues such as injector or rail pressure bleed-down/leak-off when hot, or a pressure control valve fault

Answer: D — Hot-fuel handling issues such as injector or rail pressure bleed-down/leak-off when hot, or a pressure control valve fault

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Practice more: ASE S2 Diesel Engines (School Bus) Practice Questions - ASE S2 - Diesel Engines (School Bus) Certification Exam →