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  • 0patience 02/06/08 2:24 am PST

    If the Malfunction Indicator Lamp turns on, and a DTC code P1345 sets after installing the distributor, this indicates an incorrectly installed distributor.

    Rotate the number 1 cylinder to Top Dead Center (TDC) of the compression stroke.
    Align white paint mark on the bottom stem of the distributor, and the pre-drilled indent hole in the bottom of the gear. NOTE: The OBD II ignition system distributor driven gear and rotor may be installed in multiple positions. In order to avoid mistakes, mark the distributor on the following components in order to ensure the same mounting position upon reassembly:
    The distributor driven gear
    The distributor shaft
    The rotor holes
    Installing the driven gear 180 degrees out of alignment, or locating the rotor in the wrong holes, will cause a no-start condition. Premature engine wear or damage may result.
    With the gear in this position, the rotor segment should be positioned.
    The alignment will not be exact.
    If the driven gear is installed incorrectly, the dimple will be approximately 180 degrees opposite of the rotor segment when it is installed in the distributor.
    Using a long screw driver, align the oil pump drive shaft to the drive tab of the distributor.
    Guide the distributor into the engine. Ensure that the spark plug towers are perpendicular to the centerline of the engine
    Once the distributor is fully seated, the rotor segment should be aligned with the pointer cast into the distributor base.
    This pointer may have a 6 cast into it, indicating that the distributor is to be used on a 6 cylinder engine or a 8 cast into it, indicating that the distributor is to be used on a 8 cylinder engine.
    If the rotor segment does not come within a few degrees of the pointer, the gear mesh between the distributor and the camshaft may be off a tooth or more.
    If this is the case, repeat the procedure again in order to achieve proper alignment.
    Install the distributor mounting clamp and bolt. Tighten Tighten the distributor clamp bolt to 18 lb ft.
    Install the distributor cap.
    Install two NEW distributor cap screws. Tighten Tighten the screws to 21 lb in.
    Install the electrical connector to the distributor.
    Install the spark plug wires to the distributor cap.
    Install the ignition coil
    Install the air cleaner assembly.
    Connect a scan tool. IMPORTANT: If the Malfunction Indicator lamp is turned on after installing the distributor, and a DTC P1345 is found, the distributor has been installed incorrectly.
    Monitor the Camshaft Retard Offset value.


    CAMSHAFT RETARD OFFSET TEST
    The ignition timing cannot be adjusted. The distributor may need adjusting to prevent crossfire. To insure proper alignment of the distributor, perform the following:
    With the ignition OFF, install a scan tool to the DLC.
    Start the engine and bring to normal operating temperature. IMPORTANT: Cam Retard Offset reading will not be accurate below 1000 RPM
    Increase engine speed to 1000 RPM .
    Monitor the Cam Retard Offset.
    If the Cam Retard indicates a value of 0°±2° , the distributor is properly adjusted.
    If the Cam Retard does not indicate 0°±2° , the distributor must be adjusted.
    ADJUSTING CAMSHAFT RETARD OFFSET
    With the engine OFF, slightly loosen the distributor hold down bolt. IMPORTANT: Cam Retard Offset reading will not be accurate below 1000 RPM
    Start the engine and raise engine speed to 1000 RPM .
    Using a scan tool monitor Cam Retard Offset.
    <<>> Rotate the distributor as follows:
    To compensate for a negative reading, rotate the distributor in the counterclockwise direction.
    To compensate for a positive reading, rotate the distributor in the clockwise direction.

    Repeat step 4 until 0°±2° is obtained.
    Turn the ignition OFF.
    Tighten the distributor hold-down bolt to 25 lb. ft.
    Start the engine, raise engine speed to 1000 RPM and recheck Camshaft Retard Offset

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