i replaced intake gasket and now timing is off.. how do i time this vehicle?
May 26, 2009 at 2:50 PM
1999 GMC Yukon timing
1999 GMC YUKON
FREE2ROK1975
- MEMBER
- 1 POST
Advertisement
BRIAN 1
- ✓ASE Certified Mechanic
- 1,030 POSTS
like this:With the ignition OFF, connect the scan tool.
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.
Increase the engine speed to 1,000 RPM while performing the following steps.
Use the scan tool in order to monitor the Cam Retard Offset.
If the Cam Retard indicates a value of 0 degrees, the distributor is properly adjusted.
If the Cam Retard does not indicate 0 degrees, the distributor must be adjusted. With the engine OFF, slightly loosen the distributor hold down bolt. Start the engine and raise the engine speed to 1,000 RPM.
Use the scan tool in order to monitor the 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 degrees is obtained.
Turn OFF the ignition.
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.
Increase the engine speed to 1,000 RPM while performing the following steps.
Use the scan tool in order to monitor the Cam Retard Offset.
If the Cam Retard indicates a value of 0 degrees, the distributor is properly adjusted.
If the Cam Retard does not indicate 0 degrees, the distributor must be adjusted. With the engine OFF, slightly loosen the distributor hold down bolt. Start the engine and raise the engine speed to 1,000 RPM.
Use the scan tool in order to monitor the 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 degrees is obtained.
Turn OFF the ignition.
May 26, 2009 at 8:59 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.