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Chevy man
Chevy man, Chevy Technician
Category: Chevy
Satisfied Customers: 4942
Experience:  ASE Certified as an L1 Master Technician with extensive experience in Chevy products
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1997 chevy Tahoe: set stripe..needs disconnected

Resolved Question:

need to set timing in 1997 chevy Tahoe where is the wire (tan with black stripe) located that needs disconnected before setting the timing?
Submitted: 10 years ago.
Category: Chevy
Expert:  Chevy man replied 10 years ago.

The ignition timing is not adjustable on this year. If you turn the distributor, you will only throw the fuel injecters out of synch and put the check engine light on.

The base timing is determined by the Crankshaft Position Sensor.

Customer: replied 10 years ago.
Reply to Chevy man's Post: replaced the intake manifold gaskets, therefore the distributor was removed and put back in, the check engine light is on with a generic misfire code...does a scan tool have to reset the timing?
Expert:  Chevy man replied 10 years ago.

The timing is not off, the injecter synchronization is along with the ignition synch.

You will need a professional scan tool to adjust this, not just a generic code reader.

Here are the instructions.

The ignition timing cannot be adjusted. The distributor may need adjusting to prevent crossfire. To insure proper alignment of the distributor, perform the following:

  1. With the ignition OFF, install a scan tool to the DLC.
  2. Start the engine and bring to normal operating temperature. IMPORTANT: Cam Retard Offset reading will not be accurate below 1000 RPM.
  3. Increase engine speed to 1000 RPM.
  4. Monitor the Cam Retard Offset.
  5. If the Cam Retard indicates a value of 0°+/-2°, the distributor is properly adjusted.
  6. If the Cam Retard does not indicate 0°+/-2°, the distributor must be adjusted.


  1. With the engine OFF, slightly loosen the distributor hold down bolt. IMPORTANT: Cam Retard Offset reading will not be accurate below 1000 RPM.
  2. Start the engine and raise engine speed to 1000 RPM.
  3. Using a scan tool monitor Cam Retard Offset.
  4. 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.

  1. Repeat step 4 until 0°+/-2°, is obtained.
  2. Turn the ignition OFF.
  3. Tighten the distributor hold-down bolt to 3 Nm (25 lb. ft.).
  4. Start the engine, raise engine speed to 1000 RPM and recheck Camshaft Retard Offset.

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