I have a 95 z28 camaro with a brand new accel optispark and accel coil and new taylor 10.4 wires and new spark plugs and it has spark. We start the car up and the 6 and 8 exhuast are cold on the hedders. We pulled the injectors out and tested them with 12 volts and they were clicking. So what else could be causing this problem?

 

If the gas is going in and not being burnt by the cylinder i would check to see if you have spark. Check both ends of the plug wires as well as the spark plug itself. Could be a couple of other things to.