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HOMESERVICE MANUALSMAZDA1991RX-7 TURBOREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGIGNITION CHECKSINITIAL TEST (NAVAJO)
1991 Mazda RX-7 Turbo

Initial Test (NAVAJO)

1991 Mazda RX-7 TurboSECTION Initial Test (NAVAJO)
NOTE: While performing EDIS diagnostics, DO NOT connect Electronic Control Assembly (ECA) to breakout box unless directed otherwise. Unless test procedures indicate otherwise, perform the following tests in sequence shown.

Check for any stored trouble codes and repair as necessary. See appropriate G - TEST W/ CODES article in the ENGINE PERFORMANCE section. Using a high-output spark plug tester, check for spark at all spark plugs. If spark is present at ALL spark plugs, go to CHECK PROFILE IGNITION PICKUP (PIP) AT EDIS MODULE (NAVAJO). If no spark is indicated or spark only occurs at some spark plugs, go to CHECKING PLUGS & WIRES (NAVAJO).

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.