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Home >> Saab >> 1978 >> 99 Base >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Tune-Up Procedures - 4-Cylinder >> Ignition Timing >> 1977-79 Models
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1977-79 Models

Connect tachometer and timing light to engine. Disconnect vacuum hose and place transmission in Neutral. Check timing at 2000 RPM. If not within specifications, loosen distributor retaining screw and rotate distributor housing. Reconnect vacuum hose and adjust engine idle speed.

IGNITION TIMING SPECIFICATIONS

Application RPM Timing
1974 Models
  99 800 14°BTDC
  99E
    Federal 800 12°BTDC
    Calif. 800 4°BTDC
1975-76 Models
  Federal 800 14°BTDC
  Calif. 800 12°BTDC
1977-79 Models 2000 20°BTDC
Fig 1: Typical Ignition Timing Mark Location
G09326540Courtesy of SAAB-SCANIA OF AMERICA, INC.