Problem with my 2001 Lincoln Town Car

Hey Guys…When I am driving, regardless of the speed at which I am traveling or the weather conditions, etc. The car arbitrarily surges, making a sort of grinding sound. I have to quickly tap the accelerator to stop it…a real problem if traveling in rush hour traffic, for example, so as not to run into the car in front of me. I have mentioned this to the folks who service my car but, naturally, it never does it in the shop. Would much appreciate any ideas to correct this frustrating (and possibly dangerous) problem…

As a test, try removing the fuse that allows the cruise control to work. If this fixes it, then you at least know what’s happening…(although I can’t see how tapping the accellerator would stop it, so this likely won’t work).