EGR Control Valve

1991 Mazda 929 BaseSECTION EGR Control Valve

Bring engine to normal operating temperature and run at idle. Disconnect and plug vacuum hose at EGR control valve. Engine should run smoothly. Connect vacuum pump to EGR control valve and apply more than 2.36 in. Hg. Engine should run rough or stop. If not, clean or replace EGR control valve.

Fig 1: EGR Vent & Vacuum Solenoids
G65765Courtesy of MAZDA 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.