Ignition Timing: Adjustments
ENGINE TUNE-UPPreparation
1. Warm up the engine to normal operating temperature.
2. Shift the transmission into P position.
3. Turn off all loads.
1. Headlight
2. Blower motor
3. Rear window defroster
4. Power steering
4. Connect the SSTs (NGS) to the data link connector 2 located under the driver side dashboard and select the "PID/DATA MONITOR AND RECORD", function.
5. Select "RPM" on the NGS display.
6. Press SET UP and turn the test mode on. (press ON)
7. Press CANCEL.
8. Press START.
Ignition Timing
1. Perform "Preparation".
2. Verify that the idle speed is within the specification; if not, adjust it.
Specification:
500 - 900 rpm
3. Verify that the timing mark (yellow) is within the specification.
Specification:
BTDC 10 - 12° (11 ± 1°)
4. If not as specified, loosen the distributor lock bolts and turn the distributor to make the adjustment.
5. Tighten the distributor lock bolts to the specified torque.
Tightening torque:
19 - 25 Nm {1.9 - 2.6 kgf/m, 14 - 18 ft. lbs.}
6. Verify that the idle speed is within the specification.
7. After adjusting the ignition timing, press SET UP and turn the test mode off. (press OFF)
8. Press CANCEL.
9. Verify that the timing mark (yellow) is within the specification.
Specification:
ATDC 2 - BTDC 34°
Idle Speed
1. Perform "Preparation".
2. Verify that the idle speed is within the specification.
Specification:
760 - 800 (780 ± 20) rpm
CAUTION: The throttle adjusting screw is set at the factory and must not be adjusted. Any adjustment will negatively affect the engine's performance.
3. If not within the specification, adjust the idle speed by turning the air adjusting screw.
4. Press SET UP and turn the test mode off. (press OFF)
5. Press CLEAR to clear previously selected items.
6. Disconnect the SSTs.
Idle Up Speed
1. Perform "Preparation".
2. Press SET UP and turn the test mode off. (press OFF)
3. Press CANCEL.
4. Press START.
5. Verify that the idle speed is within the specification.
Specification:
760 - 800 (780 ± 20) rpm
6. If not as specified, adjust the idle speed.
7. Check the idle speed with the following load conditions.
8. If not as specified with all load conditions, inspect the idle air control valve. If not as specified with some load condition, check related input switches, harnesses and connectors.