UPDATE: Sprayed a little wd-40 and she's steady at about 7 mph now. that was easy enough.

 

UPDATE #2: ok the problem, while not as bad as before, still exists. if im at a complete stop and i take my foot off the break it goes up to 10 and feels like its trying to shift but can't, unlike before where it did it relatively easy and kept speeding up. If i'm at a certain speed, lets say 30, and i take my foot off the gas, it acts like its in cruise control and just stays at 30 without slowing down, sometimes speeding up a bit to say 35 and staying there. it's probably the tb, i'll look into it more later.

 

is your cruise control on perhaps?

 

I wish it were that easy

 

this is gonna sound stupid. but is your floor mat in way of gas pedal?

 

In response to Yenko, maybe some hair or lint is stuck up in your pedal too, you might want to try cleaning it out.

 

If you sprayed some 40 on it and it fixed I'm assuming you sprayed it on the throttle? If that fixed it for a wile but it's doing it again check for vaccume leaks. One of the best ways to do that is while the car is at idle and spray the 40 on your vac lines and if the idle changes that's the line. I also didn't see if you said it was the V6 or the Z28 car? I know that some of the GM V6's had an issue with the intake gasket and I believe it was a recall but not for sure. I know someone I work with has a bad intake on a grand am V6 (3.4 or something, can't remember) and I hear that it's most of the V6's. To make things simple, if you have a vaccume leake with the OBD2 the computer isn't seeing the vac it wan't so it'll idle it different wich cause it to go faster because it must have that certain vac. Hope this helps?