[whoath]

I have a question for everyone, I have a 2005 BMW Z4 2.5i. About 2 months ago my car started to give problems. When I push the brake the engine would rev up sometimes to the point at a stop I have to put it in park. When I let the brake off it almost dies. The car is an automatic not a stick. Not that I beat my car but when you put the car in drive hit the brake and than hit the gas it does nothing and I mean nothing it`s like the gas pedal is not hooked to anything. I drive this car every day over 100miles I really need to fix it can anyone please point me in the right place...... It is showing codes but from my research some codes could mean a lot of things....... HELP

PS I do all the work on my car so if someone could please help.......

The codes I get are po174,po171,po102,po1447
I cleared all the codes today waiting until tomorrow to see if they come back but the problem with the car is still there.......
I rebuilt vanos over the weekend power better problem still there....