[Grubby]

Brent,

My primary problem before this change was lean at steady cruise between about 1600 and 2200. That condition is now much worse and the rpm range where it happens got wider. This is the top of the idle circuit range.

IABs control lean/rich at the top of the idle circuit and also how high the top of the idle circuit goes.

The problem of trying to drive down the driveway at less the 1500rpm arose with the IAB change.

Correct me if I am wrong. I think the IFR controls the low range of the idle circuit. If correct idle can't be achieved wth the idle mixture screws then IFR needs changed.

If I put the IABs back to original 70s I would not have a problem in the lower ranges of the idle circuit.

The ranges my problems are in are not even close to the ranges controlled by the HSABs, so I see no need in messing with them.

About the only thing left to do is go the other way on the IABs.

John