I have replaced the fuel filter, fuel injectors, main relay, distributer cap and rotor, and ignitor. the car still has no spark .how do I test the coil, and what else could cause a no spark no start?

 

Verify the resistance of the coil windings.
Verify the coil is actually getting battery voltage.
Verify the bonding and ground jumpers to the engine are clean and tight.
Verify the battery is fully charged and the battery connections are clean and tight.
Verify the ignition switch is not overly worn, if you have heavy keys/trinkets/charms/etc on the key chain it will pull down on the switch and cause it to wear and not make contact. You can try jiggling the key when attempting to start.