2005 ford freestyle surges while foot on brake

My 1st guess or 1st instinct would be to say it's a computer software issue, becasue I can't think of anything mechanical that could cause this type of issue. I suggest instead of asking here, you contact your car dealer or manufacturer.
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sounds like you have a vacuum line issue or connection. stepping on the brake sucks vacuum from the engine which may help understand where to start looking.

hi u might have a problem in the power steering pump and its loading up the motor through the drive belts.it would pay to have it checked good luck

Make sure you have no vacuum leaks and check/replace the Idle Air Control valve, its located on the side of the thottle body.

Try shifting to nuetral at stop signs for now. Will it keep running in gear with you foot on the brake? How about with the parking brake? You may have a simple vacuum leak at the brake booster.

have 05 freestyle trouble code p2106 came up dealer said it was eletronic throttle body what is this part

check your belts

the 2.7l has a sludge problem. This could cause the stalling and loss of power. There's a few fixes, the new water pump (which is part of the problem) doesn't dump coolant into the oil pan. Easy way to check is to simply drop the oil pan.

You need to have your engine flushed and cleaned out. One or more of your spark plugs aint firing. You need to replace them all to include the wires as well. If you dont get your engine flushed, you could blow your engine up.

Hey! Me too same problem. Just a slight increase in RPM after putting car in reverse or drive and with foot on the brake, presumably brake light circuit lit. Just enough to be startling, then annoying. And yes, the dealer said it registers as possible problem with the throttle body, but then cant't repeat the problem. I am thinking maybe there is a current leakage into the fuel injection system from the brake light circuit because that's the only time it seems to happen.