93' Maxima wont start Possible Anti-thieft problem

[morgrafx]

I bought a 93' maxima, it ran very well for about 5 months. I got in to start it one day and it took a few tries but started. It did this 3 more times. I parked it and the next morning when I went to start it, it was like it was out of gas. The anti theft light was flashing, I tried to start it till the battery died. Recharged the battery and tried again but the same thing happened. I let it sit for 2 weeks b4 I tried again. This time it started fine but it did the same thing a few tries later. I've changed anti thieft relay, ran diognostic (no codes, code came up) changed plugs and wires. Sometimes it will start and sometimes it won't. Is there a way to bypass secruity system or just take it out completely? Any help will be GREATLY APPRECIATED thanks.

[morgrafx]

It seems to start more often when the sun warms it up. In the morning it won't start most of the time but as it sits and warms thourgout the day most of the time it will start.