Hello everyone I will get straight to the point. I have an idle issue. Here is all information on what's been to the car since I purchased to fix. There is new coil packs from oriellys and OEM NGK spark plugs gapped to .044. I have also put new valve cover gaskets and new OEM valve covers. I have relearned the throttle body and ECU after doing so. All vacuum lines have been properly hooked back up. The idle is sitting at 400 in park, but my reader says it is at 725-737. Fuel injectors have been cleaned as well. The only other thing that was done is a muffler delete and it was previously done by previous owner. I'm stuck at this point and just need some guidance from here.

 

Check out the FSM section EC - Engine Controls, under "basic service procedures" has the steps for recalibrating the idle air algorithm.

https://www.nicoclub.com/infiniti-service-manuals