Savana 1/2 Ton Van V8-5.7L VIN R (2001)
Distributor: Service and Repair
Camshaft Retard Offset Adjustment
TEST PROCEDURE
You cannot adjust the ignition timing. You may need to adjust the distributor in order to prevent crossfire. To insure proper alignment of the
distributor, perform the following:
1. With the ignition OFF, connect the scan tool.
2. Start the engine. Allow the engine to idle until the engine reaches the normal operating temperature.
IMPORTANT: The Cam Retard Offset reading will not be accurate below 1,000 RPM.
3. Increase the engine speed to 1,000 RPM while performing the following steps.
4. Use the scan tool in order to monitor the Cam Retard Offset.
5. If the Cam Retard indicates a value of 0 degrees, the distributor is properly adjusted.
6. If the Cam Retard does not indicate 0 degrees, the distributor must be adjusted.
ADJUSTMENT PROCEDURE
1. Remove the engine cover.
2. With the engine OFF, slightly loosen the distributor hold down bolt.
IMPORTANT: The Cam Retard Offset reading will not be accurate below 1,000 RPM.
3. Start the engine and raise the engine speed to 1,000 RPM.
4. Use the scan tool in order to monitor the Cam Retard Offset.
5. 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.
6. Repeat step 4 until 0 degrees is obtained.
7. Turn OFF the ignition.
NOTE: Refer to Fastener Notice in Service Precautions.
8. Tighten the distributor hold-down bolt.
Tighten
Tighten the bolt to 3 N.m (27 lb in).
9. Install the engine cover.
10. Start the engine.
11. Raise the engine speed to 1,000 RPM and view the Camshaft Retard Offset.
