every now and then, when i take off from a dead stop the engine will simply not accelerate, you can have it full throttle and it will barely accelerate, sometimes i can hear it pop threw the intake and then it will just take off and run fine, im pretty much convinced it is fuel related, im gonna check the fuel pressure this weekend and maybe find something....the problem is it only does this maybe once a day, and i drive it probably 50 miles a day, its a 97 blazer with the 4.3l, any other ideas guys.....Thanks! i did put a scanner on it and only things that came up were a cylinder mis-fire, plugs and wires took care of that code, and an 02 sensor was not working correctly, i havent looked into that yet, but will before too long!