Hello,
RS4StagMan - Thanks for you comments, the RB25DET has a idle air control valve, The VQ35 doesnt, it uses the throttle body to control the idles air.
I took the car to Main North Nissan (Adelaide) this morning, when they plugged the consult on to it, they could only acheive the same results with idle air volume learning as i could (800rpm), and yes consult couldnt get it to hold the learning either.
When i got home, i pulled the throttle body appart. There is nothing interesting in there, there are the potentiometers (throttle position sensors) and the motor.
The screw does nothing but preload the return spring, which is set in the factory.
DO NOT ADJUST THESE SCREWS.
ANDY65B - good work on the PCV, will have to try that.
ZEI20L - I havent changed the plugs, the car has only done 62,000, and when i checked them at 60,000 they were fine.
Cheers
Pete