Hi,
Last week finally change my old AW71 to a good AW70 on my 240 Turbo 83, before the change if feel more power from the engine, but after the swap If feel poor response of the car, for example about 2 years when the old tranny works fine, sometimes I press the pedal al 100% with the brake pressed I see the turbo goes to the midle of the yellow part, now I make the same and only goes to the first part of the yellow on the turbo´s gauge.
Is there a vaccum leak, or where to start the check. Any advice thanks!

Edwin