1991 Subaru XT AutomaticFACTORY OEM SERVICE PROCEDURE

6-Cylinder Ignition Timing: XT6

  1. Ensure engine is at normal operating temperature and idle speed is correct. Place transaxle in Neutral (M/T) or Park (A/T).
  2. Ensure throttle valve is closed and throttle position sensor is correctly adjusted. Plug in 2 test mode connector wires. See Fig 1 .
    Fig 1: Locating Test Mode Connector (XT & XT6)
    G118286Courtesy of SUBARU OF AMERICA, INC.
  3. Check ignition timing. Timing marks are on crankshaft pulley. If necessary, adjust ignition timing by loosening distributor hold-down bolt and rotating distributor.
NOTE: When checking timing, the CHECK ENGINE warning light will come on; this is not an indication of problem. Ignition timing cannot be set if idle contacts in TPS are open and test mode connector is not plugged in.
6-CYLINDER IGNITION TIMING

Application Degrees BTDC @ RPM
XT6 20 @ 750
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  • • You smell fuel, burning insulation, or see smoke.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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