u/023kyle

Hello. First post here , I have an 04 g35 coupe de with 151k miles. I brought this car a few weeks ago and this issue was not happening. As seen in the video when i rev the car it looks like the needle is hanging and then goes back to normal idle. Any idea why this is happening? I have replaced the throttle body and done all the idle relearns correctly. I’ve also replaced all coils and plugs with hitachi coils and ngk plugs, new pcv valve and hose, cleaned the maf sensor, and I smoke machined the intake system and found no leaks. I will also mention I do have some o2 codes also like p1148 and p1031. Any help would be appreciated thanks.