This paper aims at characterizing the instabilities created by the dynamic redistribution of air liquid two-phases through the pump to allow for utilizing a pulsating air injection as a new mode to control and optimize the pump performance. Baseline performance experiments for the pump operating under continuous air injection and for three submergence ratios of 0.5, 0.7 and 0.9 are used in the present analysis. The most efficient operating points of the pump were recorded at a range of air flow rates between 1.1 and 2.3 kg/hr. The characteristics of non-developing two-phase flow were evaluated using both flow pattern visualization using high speed imaging system and instantons void fraction using capacitance sensors at the points with the highest pump efficiency. In these experiments, the dynamics void fraction signals were collected at seven different locations along the pump riser. Both the fast Fourier transform, and power spectral density functions of the void fraction signals were used to identify the effective frequency range at which to perform the pulsation air injection experiments. At lower submergence ratios, the void fraction signals along the pump riser found to take a longer time to reach quasi-fully developed values. Also, pulsating mode of injected air was found to improve the pump performance for all submergence ratios. This is mainly due to the significant changes in the two-phase flow pattern in the pump riser when air pulsating used. In this case, pulsating the air injection at the optimum frequency allowed for maintaining a slug flow pattern during the pump operation and the best pump performance was achieve. Pulsating air injection at different offset frequencies were also evaluated for a dual injection airlift pump. It was found that an overlapping offset frequency or an alternating frequency between the two air injection ports can achieve a better pump performance for high submergence ratios while synchronous pulsation mode was found to be the most effective at improving the pump performance at low submergence ratios.