just had a look at our tune for the 2.1 we got and our idle figures are

manifold revs 800 1100 1600
25kpa 17 17 26
35kpa 18 20 29
45kpa 21 24 36

were on slightly bigger injectore and you should find it'll like idling around 15 afr, make sure your idle timings are all correct as somethings a miss