Hello boys hope yall doing great, unfortunately i have no good mechanics around me so i had to ask on the forum, my problem is that the car runs amazing when i first start it and warm it up a little , she’s a ****ing rocket , then after like 30-60 minutes of driving she starts to lose power specially on low rpm acceleration, the loss of power is noticeable in addition to a kinda shaky idle i can feel the car being jerky when trying to slow down before a redlight or a speed bump, to give you more info on the car , it’s an 03 g35 coupe my h02 and air fuel ration sensors are deleted, in addition to codes appearing on the scanner such as , closed loop bank 1 and fuel temperature sensor A high temp , if anyone could offer some help that would be amazing , thanks in advance

 

I didn't even think these cars would operate except in limp mode if you didn't have the upstream O2 sensors plugged in.

Fix the O2 sensor problem to start with, you NEED the upstream ones that's how the car knows how much fuel to deliver. Downstream sensors are just catalyst efficiency sensors and you can trick them with non-foulers.

Then go after whatever broke on the fuel pump that's giving the fuel temp high resistance code.

Then pull the spark plugs and inspect for wear.