Black Smoke tacoma 2000 pre-runner

My truck revs go up and down. When I turn it on, rpms go nearly zero, then go to 2000. I was trying to get rid of the code P0172, and I changed all o2 sensors, the MAF sensor, and the throttle position sensor, and I still had the check engine. The truck has turned off at idle and smells like fuel when at a stop or idle. It runs rough, and I was going to change and buy Denso injectors. Today after work, all of a sudden, the check engine light went away, and then, after a while, I went back on. I checked the code and it changed!? It now has P0125 and went on and changed the ect sensor and nothing changed. I don't know what to do. I'm kinda frustrated and don't know what it is.

 

Welcome, sorry to hear about your troubles. You'll probably get more help if you post this in the first gen area.

 

Welcome aboard!

 

Thank you guys!!!