Ignition Timing: Adjustments

Adjust ignition timing under the following conditions:

1. Engine idling at normal operating temperature.
2. Lights, A/C, and all accessories turned off.
3. Air cleaner installed.
4. Distributor vacuum hose from carburetor, canister purge vacuum hose, EGR vacuum hose, and Inlet Temperature Control (ITC) valve vacuum hose disconnected and plugged.

Timing procedure:

1. Connect timing light.
2. Loosen distributor mounting bolt.
3. Adjust timing to specification:
6° BTDC @ 900 rpm.
4. Tighten distributor mounting bolt.
5. Reconnect vacuum hoses.