stoichiometric AFR is not targetted through-out the rev range, in fact the cg13 ecu only aims for it once or twice in its entire fuel map, its not a straight cut answer this one, see Table below
See where i dropped of the throttle
Time RPM MAF v Thr v Inj Duty
09:15:27 6525 4.69 4.1 14.75 80.2
09:15:27 6550 4.66 4.1 14.75 80.51
09:15:27 6600 4.69 4.1 14.75 81.12
09:15:27 6625 4.62 4.1 14.13 78.01
09:15:27 6675 4.73 4.1 14.75 82.05
09:15:27 6725 4.69 4.1 14.57 81.65
09:15:27 6775 4.76 4.1 14.75 83.28
09:15:28 5462 1.84 0.42 0.43 1.96
09:15:28 5462 1.86 0.42 0.43 1.96
09:15:28 5650 1.86 0.42 0.43 2.02
09:15:28 5688 1.9 0.42 0.43 2.04
09:15:28 5800 1.94 0.42 0.43 2.08
09:15:28 5875 1.92 0.42 1.43 7
09:15:28 5975 1.92 0.42 1.43 7.12
09:15:28 6162 1.96 0.42 1.51 7.75
09:15:28 6200 1.96 0.42 1.59 8.22
09:15:28 6325 2.03 0.42 1.65 8.7
09:15:28 6412 2.14 0.42 1.69 9.03
09:15:28 6538 2.44 0.42 2.69 14.66
09:15:28 6700 3.3 0.66 6.41 35.79
09:15:28 6662 4.37 1.98 12.75 70.78
09:15:28 6775 4.65 3.14 13.81 77.97
09:15:28 6550 4.66 3.82 13.77 75.16
09:15:28 6675 4.72 4.06 14.75 82.05
09:15:28 6700 4.66 4.06 14.63 81.68
09:15:28 6762 4.7 4.06 14.71 82.89
09:15:28 6800 4.74 4.06 14.53 82.34
this is a nearly stock standard 1.3 ecu (number 16)