my circle track car is a 91 G20 with a nissan labled SR20 which i have no idea what year...I do know is has a JDM header and most emissions equip removed.

my question is the fuel rail has two electrical connections one on the passenger side which is plugged in and one on the driver's side which is not....what is that plug on the driver's side.

The car runs pretty rich and idles a bit high (1500 rpms or so) and I'm trying to track down the cause.

thanks for your help

It is for california emissions and isn't used for anything. You need to go through the timing/idle calibration steps. Mainly -

1) calibrate the TPS sensor
2) set base timing (you probably want 17-19* for max power)
3) Set base idle using iacv adjustment

These steps can all be found in write-ups on this forum.

Brent

thanks a ton!