Ignition Timing (CAPRI)

Place automatic transmission in Park or manual transmission in Neutral. Disconnect and plug hoses attached to vacuum diaphragm assembly on distributor. Connect tachometer and timing light. Turn off all electrical loads.
Start engine, and warm it to operating temperature. Ensure idle speed is set to specification, adjusting if necessary. See IDLE SPEED & MIXTURE. Determine initial timing. See IGNITION TIMING table. If base timing is not correct, loosen distributor mounting bolts and rotate distributor until marks align. Tighten bolts to 14-18 ft. lbs. (19-25 N.m).
Increase engine RPM while observing timing light. Verify ignition timing advances. For turbo models, go to step 5). For non-turbo models, continue with next step.
On non-turbo models, apply 16 in. Hg vacuum to chamber "A". See Fig 1 . Verify timing advances by 26-30 degrees. Remove vacuum source from chamber "A". Apply 8 in. Hg vacuum to chamber "B" while observing timing. Verify timing advances by 3-7 degrees. Stop engine and remove test equipment.

Fig 1: Identifying Vacuum Chamber Connections (Capri Non-Turbo)
Courtesy of FORD MOTOR CO.
On turbo models, apply 20 in. Hg vacuum to advance diaphragm. Verify timing advances by 13-17 degrees. Disconnect vacuum source. Apply 8 psi (.6 kg/cm² ) pressure to advance diaphragm. Verify timing retards by 3-7 degrees. Stop engine. Remove test equipment.