Why is my 1994 Oldsmobile 98 running good some time and others it's stalls alot

What is your question?

It stalled 3 time going back to my house and in then ran at a very low rpm and won't move up it's own power, but after this is cranked for 4 or 5 seconds and started hasnt ever not started, 2 hour later I drove it and it started great and drove good. I have replaced the camshaft position sensor and I then it is the fuel filter/pump

How long has your 1994 Oldsmobile 98 had this problem?

Started in April and has gotten worse sence