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Home >> Infiniti >> 1994 >> G20 Automatic, 1RL4F03A >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Adjustments >> 4-Cylinder Ignition Timing
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4-Cylinder Ignition Timing

  1. Start engine, and warm to normal operating temperature. Operate engine for 2 minutes at 2000 RPM under no-load. Perform self-diagnostic procedure, and check for smooth engine operation. See the TESTS W/CODES article. Repair or replace components as needed. If okay, go to next step.
  2. Turn engine off. Disconnect throttle position sensor connector. Start engine and snap throttle to 2000-3000 RPM, 2 or 3 times, under no-load and then allow engine to return to idle.
  3. Connect timing light to cylinder No. 1 spark plug cable. Check ignition timing. See IGNITION TIMING table. If necessary, adjust timing by loosening distributor mounting bolts and turning distributor. With ignition timing correctly set, check idle speed and mixture. See IDLE MIXTURE  and also 4-CYLINDER IDLE SPEED  . Reconnect throttle position sensor connector.
IGNITION TIMING

Application Specification
G20
With A/C On 13-17 @ 800-900
With A/C Off (2) 13-17 @ 750-850
(1) With transmission in Neutral and no load on engine.
(2) With steering wheel in straight-ahead position, no electrical load and cooling fan off.
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