Mixture Control Solenoid Mixture Screw

1. Install Mixture Control Solenoid Gauge (J-33815-1 or BT-8253-A) over throttle lever side metering jet guide. Temporarily install solenoid plunger.
2. Install lean mixture screw 6 threads. Install rich limit stop. Hold solenoid plunger downward against solenoid stop. Using Mixture Adjuster (J-28696-10 or BT-7928), slowly turn lean mixture screw in or out until solenoid plunger just contacts solenoid stop and mixture control solenoid gauge. See Fig 1 .
3. Adjustment is correct when solenoid plunger is contacting BOTH the solenoid stop and gauge. Remove solenoid plunger and gauge. Install plug at proper location. See Figure .

Fig 1: Adjusting Solenoid Mixture Screw

Courtesy of GENERAL MOTORS CORP.