Where I live we recently got the first rain of winter and morning after I went to start my car and it just kept cranking . Later when I got home from school I thought I would dig deeper into the problem and when I went to start it again it fired right up like before. I repeated this for next couple of days and pattern continued. I tried spraying brake clean in the intake in the morning when it wouln't start and it would start with the extra fuel. If anyone has any ideas let me know.

 

chances are it is moisture in the morning this time of year, and dryer in the afternoon
check for moisture under the distributor cap
wipe down the sparkplug wires and coil wire with WD40
see if those remedies help