Can the Digifant system be reset for = high altitude operations?

 I thought there was supposed to = be altitude correction, but on my recent vacation in my '90 Syncro = Westie, above 12,000 feet I had consistent stalling at idle and a very = significant loss of power. Engine freshly tuned, off course. =

Any ideas?

Thanks

Tom F.
90 Syncro Westie
83.5 9 Pax S/R GL