I changed my fuel pump and filter now it dosnt start the first time only the second

I would check to see if you are losing pressure. You should have constant pressure in the system at all times. A quick thing you may want to try is when you first go to start it don't. Just turn the key to the on position without turning the engine over for about 5 seconds. Then turn the key off. Turn the key back to just the on position again. Turn the key off. then try and start it. Turning the key to just the on position will engage your fuel pump relay for about 5 seconds which in turn will build up fuel pressure. If it starts after you do this the first time you may be losing pressure. You can always put a pressure tester on there and check the prssure while it's not running to see if you lose prssure that way. It should have pressure even when it's not running at all times. I hope this helps and good luck.