It doesn't hesitate while warming up and in park. When on road, it will hesitate badly when beginning from a stop. I believe the plug wires are in good shape, but maybe need new plugs. Replaced the mass air sensor a few months ago. Any thoughts for initial things to try?

I just checked the heater as well and it's the same situation, so it must be blower-related. Is there a relay or something that maybe failed and just won't change the direction of the forced air?

I am having the same problem with both my 89 760GLE and my 90 760 Turbo. That is, the AC is functioning and I can hear the blower working, but the air will only come weakly out of the defrost area. I cannot make it stronger or direct it to vent or any other location. All fuses seem ok. The 90 was wo...