Multiple codes for check engine light

So my uncle is up from az with his 99 taco. 210k miles, v6, auto, 4x4, 3.4, extended cab. Last tune up done at dealer sometime (unknown time/mileage) before 160k mileage. Unknown what was tuned. Has deck plate mod, k&n, which is stuck on. Cel is saying p0171 bank 1, p0120 tps, p0330 knock sensor 2 circuit bank 2. Symptoms are bogs when accelerating, feels like a misfire, when warming up runs rough, cuts out. I have advised to clean iac, and maf, and throttle body. Ideas? Advice. Working with a shoe string budget.

 

Ok so an update. I said heck with it and pulled the throttle body off and iac and cleaned both. Not the best, but %97.5 better. Runs great! But idles high around 1200 rpm when warmed up. Also cleaned maf. Wasn't too bad to begin with. Tb was NASTY! Shit ton of oil from a k&n!!

 

Most people use way more oil than is needed.

 

I would still change the upstream (front) o2 sensor, my rule of thumb is anything over 50k miles on them and replace them if you have the slightest doubt about it.

I would also clean the shit out of the MAF sensor because its going to be full of junk from that oil too and get him a dry air filter of go with oem paper filter and throw that crappy k& n away. I bet if you hold it up to a light you will see spots of light through it where dirt can go right through.

as for the high idle, maybe you forgot to reset the EFI (its getting a lot more air now that its clean) or you have a cracked vacuum line somewhere

 

The truck has multiple cracked hoses' craked air intake tube and so on. I cleaned the maf at the same time i did the throttle body. Reset the ecm or whatever the name is. Still idled high. Told him to put some miles on it. But i haven't heard from him since the day i posted all this.