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Home >> Isuzu >> 1992 >> Pickup LS, RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Engine Controls - Adjustments - CARBURETED >> Adjustments >> Ignition Timing

Ignition Timing

  1. Check ignition timing with engine at normal operating temperature. Set parking brake. Place transmission in Park (A/T) or Neutral (M/T). Connect tachometer. Connect timing light to No. 1 spark plug wire. Turn off all accessories and A/C (if equipped).
  2. Disconnect and plug distributor vacuum advance hose. Disconnect and plug fuel vapor canister purge and EGR vacuum hoses. Start engine. Check ignition timing at specified RPM. See IGNITION TIMING specifications table.
  3. If timing is out of adjustment, loosen distributor hold-down bolt and turn distributor in either direction until timing is within specification. After adjustment, retighten distributor hold-down bolt.
IGNITION TIMING (Degrees BTDC @ RPM)

Application Base Timing
All Models (1) 6 @ 900
(1) With distributor vacuum advance hose disconnected and plugged.
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