Glad you got it fixed. The same thing happened to my car, except it was the number 3 plug wire that was gone. Idled fine, full throttle fine, but moderate throttle shook my teeth out.
Where did you get your coolent elbows? I've always been able to get just the elbows and have never had to buy the entire tensioner with them. I know at NAPA and Autozone you can get the elbows by themselves. But, good move replacing them anyway. They're failure prone and are really a big PITA when you've got coolent leaking out of them all over the belt, making the belt squeel like a dead pig.