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1994 968r reduced air flow under acceleration

Heating and Ventilation

Vehicle Information: Model(924/944/968): 968; Year: 1994; Body Type: Coupe; Total Mileage: 34K;

When the AC is running, the air velocity out ofthe vents will drop quite noticably underacceleration and return when I let up. This isn'tat full throttle, but under modest acceleration.It's a lot like the vac-operated wipers behaved onmy first car. I suspect a spring-loadedvac-operated air-door in the hvac system isopening or closing under low vac due to a vac leakor failing vac motor. Also, the upper of the twoair-control sliders doesn't seem to have mucheffect. What tests might I do to help figure thisout? If things are as I suspect, is there a lessstressfull way to gain access than removing thedash?

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