I am not sure if I can help, but here are some suggestions...
If the car were truly "missing", I believe that your CEL should light up or at least blink. Do you have a CEL? If so, then you need to get it read, and then post the code on the boards for advice. I hear that Autozone reads CELs for free.
Is the RPM fluctuating when your car is "missing"? If so, when was the last time you changed the fuel filter? You might want to try and get a bottle of Chevron Techron fuel cleaner. Add it to your next tank of gas. It will help clean the fuel lines and system. This might help your problem.
1996 Contour SE Sedan 4D (Royal Blue)
Duratec V6 2.5L 24-valve DOHC
Automatic
75,000 miles
No Mods (unless you call the DMD a mod)
Replaced EGR valve (gunked up), EVR (EGR VR), PCV valve, and evaporative emissions hose (cracked).
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