Try this,

When you notice it again, turn off the OD.

Does it still happen?

I tried this and it stopped doing it ONLY when the OD was turned off! mad

Stephen

96 Contour, GL, Zetec, ATX.
03/18/1996 Build Date.
Drop in K&N
NGK Laser Platinum Premium Spark plugs
Niehoff Premium Ignition wires
Wheel Well Air Intake Resonator removed.
*Just the beginning*