1990 Mazda RX-7 TurboFACTORY OEM SERVICE PROCEDURE

Solenoid Valve

Disconnect vacuum hose from solenoid valve port "A". Blow through port "B". See Fig 1 . Verify air flows from valve air filter. Disconnect solenoid valve connector. Connect 12 volts and a ground to solenoid valve terminals. Blow through valve port "B" and ensure air flows from port "A". Replace solenoid valve if it does not perform as indicated.

Fig 1: Testing VDI Actuator
G117758Courtesy of MAZDA MOTORS CORP.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

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.