Matai Seremaiah and Jotham Napat, who are members of the Leaders Party, were sacked last week, apparently because of disgruntlement at their growing strength within the coalition.
That sparked speculation that another motion to oust the government could be looming, and the Leaders Party's votes could give the opposition the numbers needed.
Mr Seremaiah said the party was committed to the government's stability, but it can't make any promises now its members have been fired.
