Thanks czechadians!

According to my mechanic, our TPS was replaced a long time ago. He checked it when I started going to him and noticed that the wires had been extended by Toyota. I suppose it wouldn't hurt to re-check it though.???

I'm glad (in a self pity kind of way) that someone else is experiencing the same thing...it may increase the chances of pinpointing the issue.

What I found interesting was that it ran like a top for over a month after replacing the fuel filter! It acted up once for my wife on a 3-week road trip, and hasn't missed a beat since. I just want something to actually break so we can know what we're up against!

Good luck and I'll post anything which moves us in a positive direction on this.

Cheers!