1992 Infiniti G20 AutomaticFACTORY OEM SERVICE PROCEDURE

Idle Mixture

NOTE: Idle mixture is computer controlled; adjustment is not normally necessary. See I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section for testing of fuel feedback system.
  1. On G20, disconnect Air Induction Valve (AIV). On all models, disconnect engine temperature sensor harness connector. Connect a 2500-ohm resistor between engine temperature sensor harness connector terminals.
  2. Start engine, and warm it to normal operating temperature (needle in middle of coolant gauge). Run engine for about 2 minutes under no load at 3000-4000 RPM, and then return it to idle. Check idle mixture (CO% level). See IDLE SPEED & CO LEVEL  table.
  3. After checking idle mixture, disconnect resistor from engine temperature sensor harness connector terminals. Reconnect AIV and engine temperature sensor harness connector.
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:

  • • 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.

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