Tim,
    First, double check everything Mr.Cardo said. It sounds like you have
un-metered air (more than the ECU knows of) getting in. This could be from
the AFM not reporting a correct value i.e. a weak spring. Or it could be a
air leak from something like a dipstick not all the way in.
    Finally, the Air Bypass valve is adjustable but since you have a high
and low idle problem that probably is not the problem.
Ken Lewis
http://neksiwel.20m.com/