Contour Enthusiasts Group Archives Forums General Troubleshooting A weird surge/miss-type something ??

OK, so I've had to re-join since I've been away for so long I couldn't remember my old sign in, no big, I'm back. So here's the trip; 99 SE Tour, Zetec 2.0 ATX, 85K. In the past couple weeks this car has developed a very strange trait. At idle, or while driving, I get a surge, or a miss sorta. But it's not a miss or a surge. It's almost like if you turned the key off for a half second, or if it was a manual tranny it'd be like pushing in the clutch very quickly. It's a strange thing. No CEL, it's never killed the motor. Sometimes it's one time in a mile and sometimes 2 or 3 in a row. The only thing different I've done is 4 weeks ago I installed 4 new Bosch platinum plugs, and all the old plugs looked good. Nice and brown with no deposits of any kind. So anyone have a clue where to look first ? The Ford dealer drove it, put it on the computer and of course the car wouldn't do it's trick so I paid the $100 to hear; "it all checked out on the diagnostic". Figures, please holler if ya have a clue. Ken