mazda rx2 rotary

my E8 has about a 2 second fuel pump prime delay for about two weeks now.is this a symptom of a problem to come?it never did this before. about two weeks ago i was on boost driving on the freeway (about a 5 second pull at 15 psi) let off the throttle to slow down and it was like the engine had shut down for about 5 seconds.it has only done this once (shut down).last week in my fuel map at about the 2500 rpm to 3500 rpm it Linear-ise all on its own .(from the negative manifold pressure to 30 psi).it has done this twice.i am using the 1.71 firmware,could this be a firmware issue?if i remember right the serial # is 899.i have had this E8 for about a year and a half with no problems