The engine will fire up and rev to about 2,500 rpm and then drop to 0 and engine cut out. (from start to stop is about 3 sec)
Got the car look at and the Mechanic said is the fuel pump... so $300 later all seems fine, the following day... something happens.
This time was in the middle of driving on the road.

The only way to drive the car is to rev it continuously as soon as I stop it will cut out. Sometimes if I rev it for about 30-60 sec the car will run normal for about 20min or so and the same issue returns. The idling is very low ..come to the 0 mark.
The only thing done recently, I had my Oil/Oil Filter changed about 2 week ago.
So I come to believe it might be one of the following (might be wrong too)
-Air intake
-Fuel Filter (can't remember last time it got changed)
-Fuel line
-Spark plugs
any one come across this before?, any help is appreciated.
('95 GPX with no modification)