I have the AEM wideband and I just bought the serial port and usb for it but Im confused on one part. I know I need to solder the blue wire into port 2 but Im confused what do I use to ground port 5? Do I use the ground from the Wideband or do I use a seperate wire to ground the serial port to the car?

 

i believe i just used any chassis ground

 

I just used a separate wire and grounded both it and the gauge's ground to the car.

 

is there a How to Install Thread about this one? any one willing to make one with pics?

 

here you go:
https://www.evolutionm.net/forums/ec...uctions-4.html

 

^thanks

 

no prob...did you get it working?

 

i go it all working today thanks for the link.....