Not starting?

Okay. I replaced the fuel pump twice and bought a bad one the first time. Now I'm getting gas to the cylinders, but it acts like it wants to start but just don't seem to hit and run it starts up for just like a second like it's got a bad miss. That's the best way I can explain it. I thought it sounded like an older car trying to start when it has been flooded, sputters but it doesn't. Got any ideas? Oh, can I unplug the crank case sensor and start the car? Will it hurt anything to do this to see if that's my trouble and is it looking at the motor left side towards bottom on the side of motor nearest to the front of car and do you still use a timing light on this year of car if so, where's the timing marks thank you so much.