S15/T15 Jimmy 2WD V6-173 2.8L VIN B 2-bbl (1983)
6. Disconnect mixture control solenoid when cooling fan is in off cycle and and check for an RPM change of at least 50 RPM. If RPM does not
change enough, inspect idle air bleed circuit for restrictions, leaks, etc.
7. Run engine at 3,000 RPM for a few moments and note dwell reading. Dwell should be varying with an average reading of 35 degrees.
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If not at 35 degrees average dwell: Reset lean mixture screw per Step 3. Then reset idle mixture screw to obtain 25 degrees dwell per Step 5.
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If at 35 degrees average dwell: Reconnect systems disconnected earlier (purge and vent hoses, EGR valve, etc.), reinstall vent screen and set
idle speed(s) per Vehicle Emission Control Information Label on the vehicle. It is not necessary to repeat "Systems Performance Check" after
proper adjustment of carburetor.
