I have a 96 3.8 v6, with SLP intake, straight pipe(no cat for now), new o2 sensors and a o2 sim. I had the codes 171 and 174 show up and the car seemed like it missed during acceleration.

I replaced the o2 sensors, and cleared the codes. It went about 1/2 of drive time and then a code 174 came back on. I bought several bottles Seafoam, I put one in the gas tank as an additive, I used one and ran it through the vacuum brake booster line. I blew out a ton of think white smoke.

The code went away for about a day then the same code showed up. 0174 was back. Does this mean I have a bad injector in Bank 2? If it is an injector would it be worth have the injectors professionally cleaned, or should I just have them replaced.

Also if i do have to have the injectors replaced they are 22lb/hr, could the stock fuel pump handle 24lb/hr injectors, or would i make a lean condition by doing so.