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Carbureted Models

  1. If a magnetic probe timing light is being used, refer to equipment manufacturers instructions for proper hookup. If a conventional timing light is being used, connect a timing light to number 1 cylinder.
  2. Connect a tachometer to engine. Start engine and warm to normal operating temperature. Momentarily open throttle to ensure that linkage does not bind and that idle speed screw is against its stop.
  3. If vehicle is equipped with a carburetor switch, connect a jumper wire between switch and ground. Disconnect and plug vacuum line at Spark Control Computer. On 2.6L engines, disconnect distributor vacuum hose.
  4. Make sure that engine is operating at curb idle RPM. If not, adjust using appropriate procedures under Hot (Slow) Idle RPM. Check timing. If timing is within 2° of specified timing, do not adjust.
  5. If timing is not correct, loosen distributor hold down bolt and turn distributor housing until specified timing is reached. Recheck timing after distributor hold down bolt has been tightened.
NOTE: On all engines except 1.6L, magnetic probe timing socket is located at 10° ATDC. This socket is only for use with special electronic timing equipment. Do not use this socket when checking timing with a conventional timing light.
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