my '95 started losing power as i was driving down the road, i replaced the alternator and battery thinking it was that since my lights were dimming and the car was turning off while in motion. i noticed that there was fuel leaking into my engine from the fuel rail and the valve hose was loose, so i bought a new "o" ring for it and its no longer leaking, but now when i start the car it starts to rev up, then it slowly dies, it constantly does this, i dont know what the problem is, i need help. ty.

Ahhhh

I see the issue. Fron the intro post that is.

All the usual suspect apply as your last car.
Check for spark by pulling a wire off a coil and trying to start the car. Bright blue spark jumping around means you have spark. Good wires and good plugs should also be confirmed.

Fuel.. tapping the valve on the fuel rail will tell you if you have fuel to the rail. Then the question is..are the injectors firing for more than the priming. Similar to pumping the carb, your injectors give you a quick prime when you turn the key. Then once the car starts, the computer is supposed to fire them again to keep it running. Couple different ways you can check that. Listen to the injectors as it'* dying for a clicking. (stethescope or long screwdriver). Another would be to unplug a vacuum line and introduce a brake cleaner or carb cleaner as fuel. Like you would if you were testing for a plugged fuel filter on the carb.

Compression, lets assume that'* fine since it does fire.

Give this article a look. It should cover nearly all the problems. If you can't find it, just speak up.

https://www.gmforum.com/t279317/