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Home >> Isuzu >> 1993 >> Trooper LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Engine Controls - Adjustments - CARBURETED) >> Ignition System >> Ignition Timing

Ignition Timing

WARNING: This page is about a different car, the 1993 Isuzu Pickup and 1993 Isuzu Amigo. However, it is still accessible from the selected car via links, so may be relevant.
  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  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 and connect vacuum hoses.
IGNITION TIMING (Degrees BTDC @ RPM)

Application Base Timing
Amigo & Pickup (1) 6 @ 900
(1) With distributor vacuum advance hose disconnected and plugged.
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