I just replaced the spark plug wires on my 94 taurus, but the coil wire on the coil won't come off. It's not melted or frozen(it will wiggle)but it won't lift off. Is there a trick or should I pull harder? Thanks, rick

P.S. after reading txgreasemonkey's answer I removed a plastic cover protecting the coil connector, and was able to remove the coil cable. Thanks, txgreasemonkey

Try spraying the inside of the connector with WD-40. Connectors can be stubborn.