1999 pontiac grand am. Car lost all power while driving, started jumping and jerking when i gave it gas.. Now when i try to start it the engine jumps and jerks and it backfires. And when it does start it runs rough. What could it be?

What is your question?

What could be wrong with my car? It lost all power, started jumping and jerking when I gave it gas. Now when I start it, it runs rough and the engine jumps and jerks. And it backfires. WHAT COULD IT BE? Please any suggestions would be welcomed. I don't have any idea. I really need my car. It is my only means of transportation. Please help.

How long has your 1999 Pontiac Grand Am had this problem?

5 days