i drive a 92 chevrolet blazer. 4.3 Vortec V6, Edelbrock Headers, Flowmasters, Accel Wires and ignition. Hypertech Chip.

My problem is i keep losing power big time. At first it was only when i had a load on battery (ac full on and radio up) but since then it doesnt have to have anything else on. it starts to stall out especially when im idling, or anytime i get off the gas. It dies, but cranks back up immediatley. I still dont know if its electrical or fuel. So far ive replaced battery, alternator, starter, plugs, wires, and the in line fuel filter. Before i drop the gas tank, can anyone offer me help PLEASE!

Not exactly sure since you've covered up all bases with what you've replaced. Now when you say you lose power, do you mean electrical i.e. the truck just shuts off or the engine is bogging down?

Hey, I'm not completely sure, but your timing could have slipped. Just a shot in the dark,but it could be.

try getting a new throttle body

Check the idle air control valve for correct operation, also check for a vacuum leak.