Could be, I'm thinking I'll have no choice but to take it in. There are also times, like yesterday morning, when the car starts, cold, no issues, and accelerates. Very confusing.

Thanks for the reply! I replaced the whole throttle body with the TPS, so it's all new. Seemed to get a tad better rigth after replacement (this was only a couple weeks ago) but really symptoms have stayed the same.

I've got a 2006 Vibe, base 1.8l engine, 210,000-ish miles on her. Lately, when I start it, regardless of outside temp, it won't accelerate. I have to let it warm up a bit, and turn it off and back on, then after a couple of tries, it will accelerate as normal. And when I saw won't accelerate, I mean...