Tank Pressure Control Valve

1988 Chevrolet Spectrum Base, 2D Hatchback, AutomaticSECTION Tank Pressure Control Valve

Remove rubber hoses from control valve. Apply vacuum to pipe "A". See Fig 2 . Blow into pipe "B" and check if valve is open. With pipe "C" capped, apply pressure to pipe "B" and ensure air does not pass through valve. If valve does not perform as outlined, replace valve.

Fig 1: Evaporation System (Spectrum Turbo)
G93748Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.