1989 turbo 760 loosing power up hill but runns smooth down hill or level

I am not turbo savy, but this generally sounds like a fuel-quality problem. The computer may be retarding the spark because the knock sensor is sensing knock or ping. Try a tank or two of high-quality (name brand) premium fuel.

Otherwise, you are giving it more air but it isn't getting more fuel, so suspect an air leak between the AMM and the throttle body or a vacuum leak somewhere.

Just guessing...

__ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate"

That is a good guess ;)

Regards,

Boris Mohar

Got Knock? - see: Viatrack Printed Circuit Designs (among other things)

void _-void-_ in the obvious place

You've got a boost leak somewhere, check all the air hoses, particularly the rubber joints at the intercooler.