I start my car then within 1 to 2 seconds it begins to loose power then it turns off.

If I start my car then press the gas pedal it will stay on what is the reason for this is there a part in my car that is faulty or possibly going bad any advice will help.

By the way everything was working fine until a headlamp went out then I replaced the headlamps and I also pulled several small fuses to inspect them after this the car began to have problems with power loss.

Is your "Check Engine" light on? If so, get the ECM error codes.