Thanks for the quick reply JohnM. I just checked the OVP fuse and its good. The recent work replaced the distributor cap, rotor, wiring and plugs because the engine would not start at all. These fixes cured the ignition problem but the shuttering problem wasn't cured. After these problems still occurred after $700, the tech said that the cap was faulty and replaced it under warranty in addtion to a fuel injection cleaning. I appreciate all the help!!