Now that the warmer weather has arrived, the car dosn't like to start as easily. It takes upto 15sec of holding the key and pushing on the throttle to get it started. Now I was told my Spark Plug wires were going bad, but before i threw down the money I wanted to besure that this was the issue and that it couldn't be anything else.

Heres what I've had done recently:
-Vacuum Leak repaired
-New O2 sensor
-New Temp. Sensor

Does anyone know of anything else that it could be?

Thanks.