You don't need CONSULT to adjust your idle on a GA16 if there's nothing wrong with it.
All you need to do is the following:
1. Warm up and shut off
2. Disconnect fan and TPS
3. Restart and rev 3 times to 3000 rpms
4. Adjust via idle screw, clockwise idle decreases, counterclockwise idle increases
5. Once idle is set, turn off and reconnect TPS and fan
From here:
http://www.nissanforums.com/ga16de-1...st-timing.html
Used to adjust the idling on my car this way. You need to disconnect the TPS, or it'll relearn around the idle adjustment.
Question: what's the idle at, now? If you lower it, you might need to bump up the timing a bit to get it stable. There's instructions on how to adjust the timing on the same page. If you don't have a timing light and can't do it yourself, print out the instructions for whichever mechanic you are going to. Most don't understand the adaptive nature of EFI and will fail to disconnect the TPS during timing adjustment.