Montana

For a while my motor would surge everyone in a while but recently it has been doing it a lot. When I'm at a stop light idling it would surge. But if I took my foot off the brake then it would go back to normal. This isn't always the case though, sometimes it would continue to surge. Another symptom is that the surging would start out slow then get faster and faster until it would go back to normal idle. I've searched everywhere and I haven't found anything exactly like mine. I do have engine light on and it gives me 41 and 21. After some research they say the TPS(41) can cause the 21, so I'm hoping I can knock out two birds with one stone. I took off my TPS and took a voltmeter and it checks out, the spring also returns very well. I did buy a new Denso TPS just in case. Anyone have any thoughts on what it could be?

Buster Bloodclot

Real common with 22RE. See this: https://www.yotatech.com/forums/f116...ist-go-289362/

Sorry, I can't really help you. I've read that sometimes it's caused by the idle being set too high, but that wasn't the case with mine. Also, TPS, which you're about to rule out.