If it was running fine before then something is not connected properly. Recheck that the connectors to the coil packs are completely snapped in place. The spark plug boots are a bear to get all the way back on. Drink some protein and push on each one real hard, I'll bet one or more of the boots aren't all the way on. Basically, recheck the work done because most likely that's where the problem lies. Speaking from learning the hard way myself.

Les