I was experiencing some power trouble with the Ford Festiva last week. It stalled out three separate times during a short trip to town. My first thought was that the repair last year with a dab of silicone to the ignition coil was giving out, but then I decided to try a 10 dollar can of Seafoam. You put this stuff right in your tank and top it off with whatever fuel you usually use and presto...I noticed an immediate improvement. I could now get up hills with only dropping down to 4th gear instead of 3rd or 2nd. Technically speaking something happens that cleans some internal stuff to make things run smoother. No more stalling! I'm now a believer in Seafoam.