car want start
 

I need some help? When its cold outside and I'm getting ready for work I go outside to start the Z(78). I put the key in and turn to "start" the cd player turns on and the fuel pump starts humming. Ok I turn to the "on" and the car shut down the cd player turn off and the fuel pump stops humming. Try to turn the car over she just turn never trying to catch. So after I play with the key for about a minute, I turn to the " start" and everything is cool, turn to the "on" and the cd player going and the fuel pump is humming, turn the car over and she fire right like there was know problem. I had it with this little problem and it needs to be fixed. If anybody ever ran into this problem with there Z's let me know how to fix it our tell me whats the problem.