If you're confused by the YouTube Video, do this:
Hook up a scan tool. Leave everything connected on the engine as it should be... no "jumpers" on the ALDL or anything.
Watch the IAC values. Note the value NOW, write it down, post it back here. Then...
While watching the IAC values, adjust the idle screw slowly. You should see the IAC values respond / change as the ECU moves the pintle, trying to maintain the engine RPM.
Twiddle the idle screw until the IAC values are at their TARGET / TYPICAL VALUE as provided by the factory service manual (example: 18, in my post above).
See how the motor idles... surge / lope / die, etc.
This is a simplistic way of adjusting the idle screw.
Hook up a scan tool. Leave everything connected on the engine as it should be... no "jumpers" on the ALDL or anything.
Watch the IAC values. Note the value NOW, write it down, post it back here. Then...
While watching the IAC values, adjust the idle screw slowly. You should see the IAC values respond / change as the ECU moves the pintle, trying to maintain the engine RPM.
Twiddle the idle screw until the IAC values are at their TARGET / TYPICAL VALUE as provided by the factory service manual (example: 18, in my post above).
See how the motor idles... surge / lope / die, etc.
This is a simplistic way of adjusting the idle screw.
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