<LI style="mso-list: l0 level1 lfo3; tab-stops: list .5in" class=MsoNormal>Start the engine, the engine will run very slowly more like a tractor. As long as the engine stays running idle speed is not important at this point.
<LI style="mso-list: l0 level1 lfo3; tab-stops: list .5in" class=MsoNormal>The first thing to do is not set up the idle speed, but to set the Idle mixture screw to lean best idle setting. First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). The engine should pick up speed and begin to smooth out. Back out ½ turn more, or until the screw does nothing or runs worse then turn back to the point where it ran its best.
<LI style="mso-list: l0 level1 lfo3; tab-stops: list .5in" class=MsoNormal>Use your ear, not a scope or tuning instruments at this point. You want to tune the engine by sound. Adjust to best, fastest and smoothest running point.
<LI style="mso-list: l0 level1 lfo3; tab-stops: list .5in" class=MsoNormal>Now that the mixture screw is at its best running location, you can adjust the Idle speed the screw. The screw will be sensitive and should only take ¼ to ½ turns to achieve the idle speed you like.
<LI style="mso-list: l0 level1 lfo3; tab-stops: list .5in" class=MsoNormal>Check and set idle to your driving preference. Put the car in gear and apply slight load, (AC on) and set the Idle as you like it. Don’t set it too high, as this will cause causes excessive clutch and brake wear. The Idle only needs to be 7 to 900 RPM with light load or AC on.
<LI style="mso-list: l0 level1 lfo3; tab-stops: list .5in" class=MsoNormal>Recheck timing and vacuum hook ups. Recheck mixture screw to lean best idle again. If all is still best and smoothest idle then confirm and note the final settings.