1979 Mazda RX-7 GS, Automatic TransFACTORY OEM SERVICE PROCEDURE

Auto. Trans. & Calif. Man. Trans. Equipped Models

Disconnect vacuum switch and connect an ohmmeter to terminals "A" and "B". SeeΒ Figure. Start and run engine at idle. No continuity should exist between terminals. Disconnect vacuum sensing tube from vacuum switch. Continuity exists between both terminals.

Fig 1: Idle Switch Terminal Identification
G09309995Courtesy of MAZDA MOTORS CORP.
Factory Service Tools

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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.