No spark 2002 sunfire

After having problems starting the car, it finally wouldn't start and I came to find out that it had no spark. Now the battery is good and the starter does turn over, however it is not as fast as it once was. Just replaced the ignition coil assembly and still no spark also checked compression and all cylinders are 30 psi or less, I'm running out of ideals. Please someone with some knowledge help me.