access port

so the past week i have a weird rpm "surge" (not really sure what to call it) but when i give it hard throttle and i get to 3-3500 rpms, it jumps right up to 4000, only with hard throttle, i just put married and hooked up my access port today (9/28/20) and i went for a drive and when pulling...

I recently purchased a Cobb stage 1 for my Subaru wrx sti 2018. Which includes accessport and cobb sf intake. I installed the AP (no intake yet) to see how it was, and decided to put it in stage 0 (since my car is stock). Went out for a ride and it was giving me a rev limit of 3500-4000. Weird...

ok I am new but hear me out. I have headers and uppipe and the front o2 sensor will not screw in properly due to oversizing of the up pipe. evedently the o2 sensor tip rests against the piping? does this make sense? Anyways I had this done when i replaced my motor... another story... Damn...