hi phil thanks for the reply
found the issue was with the callibration of the tp
the holden throttle body doesnt close when at rest
so its probably about 10-12% open (they need about 7-9% to idle)
so when you callibrate the tp it takes that as a closed position
all i ended up doing was holding the throttle plate fully
closed at the beginning of the cal process and it works fine now
wouldnt mind hearing what other people have ended up using
for the pid controller gains though !