Ok so I’m trying to install an AEM air/ fuel gauge my car has no cat and has exhausted completely done. That sensor you see there is connected to an usb cable and that’s all. I’m confused =/ the port next to that will not come off tried my hardest it won’t budge! Should I just take the o2 senor that’s in there now and replace it with the new one I got for the gauge and that will be that? I don’t understand why that sensor in there now is only connected to a usb cable I have an AEM EMS

 

if you have and aem ems, then i dont think you need the gauge, you should be able to log directly from the usb cable (someone correct me if im wrong)

i just installed my aem wideband last night but im also running the stock o2 sensor.

 

i spoke to the tech suport from AEM and they told me you need an air fuel ratio gauge to tell how rich or lean my car is running

 

well i would swap them out then and connect the new one to the gauge and see how the car runs

 

do you have any idea why the sensor is conected to an usb cable?

 

my only guess would be to log a/f with evo scan or other program, im guessing you bought the car built this way

 

yep idkk so you think just pull that sensor and replace it with the new one i got

 

well pull the sensor out first and try to plug it and see if the car runs funny, if not i would go ahead and put in the new one

 

My guess is someone else was using a computer to log their A/F...I'd pull it out and use the one AEM supplied with the gauge. I don't think you'll have any issue if the USB cable doesn't connect to anything.