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IGNITION TIMING NOTE: Perform all adjustments with engine at normal operating temperature, cooling fan and accessories off, transmission in Park or Neutral, and front wheels in straight-ahead position. NOTE: Adjustment of ignition timing cannot be performed on vehicles equipped with Distributorless Ignition Systems (DIS). If ignition timing is not within specification, see CRANKSHAFT POSITION SENSOR in I – SYS/COMP TESTS article in this section. 1) Locate ignition timing adjustment connector. See IGNITION TIMING ADJUSTMENT CONNECTOR LOCATION table. Connect jumper wire between ignition timing adjustment connector and ground. Check ignition basic timing. 2) If ignition basic timing is not within specification, loosen distributor and rotate to adjust timing if necessary. See IGNITION TIMING SPECIFICATIONS table. Remove jumper wire from ignition timing adjustment connector.

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INITIAL CHECKS (PRIOR TO REMOVAL) PURPOSE Checking and recording the ignition timing and manifold vacuum level before and after the timing belt replacement allows for two assurances: – Initial conditions are correct. – Verifies the quality of the job after the belt has been installed. WHY Ignition Timing Ignition timing is the position of the piston on its compression stroke when the ignition coil fires the associated sparkplug. Ignition timing is affected by two sources. – Physical rotation of the distributor. – Alignment of the camshaft and crankshaft via the timing belt. Prior to replacing the timing belt it is very important to verify that this relationship is correct. If the timing belt is installed correctly the after-repairs timing check should be within 2 degrees of the pre-repairs timing check. NOTE: Minor differences, +/- 2 degrees may result from original belt stretching as it aged. If the timing belt is initially installed incorrectly, the prerepairs ignition timing may not be correct, and the after-repairs timing will differ greatly from the initial. Checking the timing before and after the job will help prevent confusion and verify the job was done correctly.

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1. Start engine and allow to reach normal operating temperature. Data Link Connector 1, Tachometer Connection 2. Connect tachometer test probe to terminal IG of the check connector. NOTE: Never let the tachometer lead touch ground as this could cause damage to the igniter and/or coil. Be sure to check that your tachometer is compatible with this ignition system before using it. Consult the operating manual for your instrument. Data Link Connector 1, Timing Connection 3. Using a service wire, connect terminals T and E1 of the check connector. 4. Using timing light, verify that the timing mark on timing cover is aligned with the mark on the crankshaft pulley. Ignition Timing: 10° BTDC at idle 5. If not as specified, loosen distributor hold-down bolt and rotate housing until the marks align. 6. Tighten the distributor bolt and recheck the ignition timing. 7. Remove service wire.

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1. Start engine and allow to reach normal operating temperature. 2. Connect tachometer test probe to the check connector. 3. Using a jumper wire, connect the T and E1 terminals of the check connector. 4. Check the idle speed. Idle Speed: M/T: 750 ±50 rpm A/T: 800 ±50 rpm NOTE: Check the idle speed and the ignition timing with the electric cooling fan OFF and the transmission in Neutral. 5. Using a timing light, check the ignition timing and compare with specification. Ignition Timing: 10° BTDC at idle. 6. If necessary, loosen the distributor hold down bolt and turn the distributor to align the marks. When finished adjusting, torque distributor hold down bolt to
13 ft.lbs (17 Nm).

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NOTICE: Always turn the crankshaft clockwise. (c) Check that the timing marks of the camshaft timing pul- leys and No.3 timing belt cover are aligned. If not, turn the crankshaft pulley 1 revolution (360°). (d) Remove the crankshaft pulley bolt. IF REUSING TIMING BELT, CHECK INSTALLATION MARKS ON TIMING BELT Check that there are 3 installation marks and front mark on the timing belt. If the installation and front marks have disappeared, before re- moving the timing belt, place 3 new installation marks on the timing belt to match the timing marks of the timing pulleys, and place a new front mark on the timing belt. 18. 19. REMOVE TIMING BELT TENSIONER Alternately loosen the 2 bolts, and remove them, the belt ten- sioner and dust boot. 20. REMOVE TIMING BELT 21. (a) REMOVE RH CAMSHAFT TIMING PULLEY Using SST, loosen the pulley bolt. SST 09960–10010 (09962–01000, 09963–01000) Remove the bolt, knock pin and timing pulley. (b) 22. (a) REMOVE LH CAMSHAFT TIMING PULLEY Using SST, loosen the pulley bolt. SST 09960–10010 (09962–01000, 09963–01000) Remove the bolt, knock pin and timing pulley. (b) 23. REMOVE NO.2 IDLER PULLEY Remove the bolt and idler pulley. 24. REMOVE NO.1 IDLER PULLEY Using a 10 mm hexagon wrench, remove the pivot bolt, idler pulley and plate washer. 25. REMOVE CRANKSHAFT TIMING PULLEY Remove the timing pulley. HINT: If the pulley cannot be removed by hand, use SST and a service bolt to remove the timing pulley. SST 09950–50011 (09951–05010, 09952–05010, 09953–05020, 09954–05011)