1987 Mazda RX-7 Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Throttle Chamber (Turbo)

  1. The No. 1 secondary throttle valve starts to open when the primary valve opens 15 degrees. See Figure . Check that it completely opens at the same time when the primary valve fully opens.
  2. Check the clearance between the primary throttle valve and the wall of the throttle bore when the No. 1 secondary valve starts to open.
  3. If the clearance is not within .043-.067" (1.1-1.7 mm), bend the tab until the proper clearance is obtained. See Fig 1 .
Fig 1: Adjusting Throttle Valve Clearance
G36895Courtesy of MAZDA MOTORS CORP.
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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.