while doing a tune up on my cadillac, i changed out 4 plugs on the3 drivers side, then changed the rotor,and cap. i attempted to start it and it would only crank. i had the module checked,it was goos, the coil in the distributor was bad so i replaced it, and still nothing. i did not do anything but pull the old distributor, changed the wires one at a time, put a new rotor and cap on it and replaced it on the engine. when it wouldnt fire i pulled the coil fron inside the distriutor cap aznd replaced it, the module was goos so i secured it back in the distributor. i still can not get it to fire...... any suggustions?????????????