1989 Ford Probe GL, AutomaticFACTORY OEM SERVICE PROCEDURE

EGR Valve

The turbocharged engine uses an electronic EGR valve where EGR flow is controlled according to ECA demands by means of an EGR valve position sensor attached to the valve. The EGR valve is operated by a vacuum signal from EGR control solenoid valve.

The non-turbocharged engine incorporates a modified ported EGR valve and a remote backpressure transducer where the EGR vacuum applied to EGR valve is modulated by sensing exhaust backpressure and bleeding off some vacuum when the backpressure is low. This provides EGR flow proportional to engine load. Vacuum supplied to EGR transducer is controlled by an EGR control solenoid valve.

Fig 1: EGR Valves
G106252Courtesy of FORD MOTOR CO.
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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.