Practice question

Air in the fuel system of a school bus diesel will MOST likely cause:

  1. Smoother idle and more power
  2. Lower coolant temperature
  3. Hard starting, rough running, surging, and possible stalling
  4. Higher oil pressure

Answer: C — Hard starting, rough running, surging, and possible stalling

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