P0170 wont go away Please help!!

So i got a 2000 tacoma trd 3.4 automatic and ive had this code come and go for the past couple years. Ive tried changing all fluids, replaced air filter, cleaned maf sensor, and cleaned fuel injectors. Anyone have any tips that might have helped them with getting rid of this code in the past? Cant smog with this code present please help!

 

I would check your o2 sensor.

 

often these things are just bad connections at the plug ins for sensors, clean and dielectric grease the sockets

 

I just recently cleared this code. What kind of spark plugs do you use? The spark plugs have to be dual electrode; there is a warning on the engine for that. That was the source of my issue (I believe, I was doing a lot.)

I had just gotten the truck from my dad & little brother; I tackled a lot of issues at once. I replaced the ignition packs, wires, spark plugs, cleaned fuel injectors, replaced seals on injectors, clleaned TB, replaced MAF, and replaced both plenum gaskets.