u could try cleaning teh IAC , but it could be alot of issues

sounds like teh problem i had with my car when the fuel pump was dieing, it would show good pressure, the only way to tell is to check ur pressure when the car is haveing a problem

also if ur fuel pressure bleeds off quickly its also a sign of the pump,


1997 30th Anniversary SS,Jethotts/ORY/GMMG, 160thermo, ,TB bypass, 1LE intake elbow, BMR STB, 32mmswaybar..21mm rear,BMR LCAs, PR,SFCs,TA,LT4 KM,255lph, shift kit