Kittysgreyvolvo and Jwalker,

Thanks for the info and suggestions.
I drove the car yesterday after cleaning and tightening the front ignition control module and as a precaution, I replaced the relay. It drove fine

Today I removed, cleaned and reinstalled the rear ignition control module.

This is my daughter's car and looking back, I had replaced coil #5 two times in the last six months. Since the front ignition control module screws were loose,
and the front one controls cylinders 1, 3, and 5 I am beginning to think that maybe the problem all along was a loose ignition control module and not a coil.

As info the car has 247K. My daughter bought the car at 89K years ago.

Now I plan to check the ignition control modules on our other 960's.

Thanks again,
Jimo