So it's a 2004 base model 1.8 Sentra. Saved it from the junkyard, put a new fuel pump (had 2psi), plugs, plug tube seals, coil boots etc. Barely moved down the road. Fixing it up for my kid.

It runs pretty well till about 5k in second gear and will bog a bit then keep going ok but the acceleration above 60 is really slow, now sure how slow it should be, but it's bad.

I inspected the cat and it's pretty plugged up so I'm not sure if this is throwing of the readings somehow?

This is after a throttle stab.

Cfm raises up pretty normally but the boost gauge sometimes shows boost while driving when it runs badly. Any idea what's up?

Would be nice if it was accurate!! Haha

 

 

Turns out it was the plugged up cat. Disconnected the rear O2 sensor and everything is normal