2001 Ford Escape Sucking sound when accelerator pressed

Sucking sounds are normally vacuum leaks, try using a can of choke cleaner and spray it in different areas around the intake. If the sound stops you probably found the area where the leak is. Also it's very important that all of your air ducts going to engine are sealed correctly as this will do it as well. That includes holes in the duct work.

Do what I said with the choke cleaner it cold also be your vacuum assist for power brakes. For something like this have a local pro look at it.

Have another mechanic look at it if it's two different cars then it's got to be something like the air intake not connected correctly or firing order etc. From your description I have given you what I can and I would need to further look at it physically to properly diagnose the problem.

It sounds smilar to a vacuum leak or the air duct has a hole in it someplace or not connected to the maf. However if you have a K&N filter or similar it will sound like that because all sound deadeners from the manufacture have been removed in the name of performance. When you do that spray choke cleaner around the throttle plate shaft and see if it disappears if it does then you have a vacuum leak at shaft. Also if the mechanic pulled the throttle body off the gasket may not have seated correctly or same one was used so is causing that. Other than that without seeing this my self I can offer nothing else suggestion wise.

One other thing if this does this all the time then have the engine smoke tested if you see smoke it leaks.