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The A/F adjustment is extremely sensitive and requires small incremental changes. Did you try the lean to rich halfway point plus 2 or 3 degrees rich method of adjustment? If you get the A/F adjusted correctly and the idle still wants to flucuate, look for another vacuum leak.
If your control and system pressures are in the range on the chart you should be OK. What you don't want is a system pressure being at one end of the range and control pressure being at another end. i.e. if control is at the low end of the range and system is at the high end of the range, you will run too rich.
The idle bypass screw allows metered air to bypass the throttleplate so it has no bearing on the A/F ratio.
Dennis
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Dennis
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