I have a 2001 Ford Taurus. For about a year, I've been having issues with the acceleration?

It randomly stays accelerated, even after I've stopped pressing the gas. It used to stop on its own after a few seconds, but starting 2 weeks ago, it got stuck and just never stops accelerating. I then started using it only on the streets, avoiding freeways because it seemed to be worse after taking a freeway, but it still stayed at about 1K RPMs, even at red lights. I'd have to push the brakes all the way down to stop it from going. Whenever I'd put it in Park, it revved up even higher, and sometimes up to 2-3K RPMs. Whenever it did that, I'd pull over and turn off my car, wait about 20 minutes, and it'd be back to normal.

Today, it got even worse. I absolutely had no choice to take the freeway, and it was a huge mistake. It stayed at around 2RPMs after I exited the freeway, and I had to pull over. When I put it in Park, it got even worse. It stayed at about 4K RPMs and almost got to 5K before it started overheating, then I turned the car off. After waiting 20 minutes, it still stayed accelerated. I waited another hour, it still stayed accelerated. I had to leave my car parked on that street and Uber home.

I did research, it seems to be a common problem with Ford Taurus's, and someone suggested to replace the Idle Air Control Valve. On the same thread, a guy said he unplugged the Idle Air Control Valve's computer cable and he was able to drive home. I did it, and voila. It now turns off when Idle but it doesn't accelerate anymore. Anyone have any ideas on what it could be?

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