I just replaced the spark plugs and the wires and now it won't start. I can hear the relay click once when I turn the key and also the fuel pump, but thats it.
What could this be?
I also replaced the valve cover gasket and the plug the other day, but Itried starting the car after the gasket was changed and it started fine.
the next day Ireplaced the wires and the plugs, after thatit wouldn't start.

 

How old is the battery? Have you load tested? Did you remove the cables and clean? (just because they look ok doesn't mean there isn't enough corrosion to cause a problem) Hard to say problem is related to anything you did. Thats where I would start, good luck