acceleration stutter and deceleation problem

I have a 95 Subaru GL wagon. I have two problems that seem related.

1. When slightly decelerating, for instance when going down a slight hill the car will rapidly (2 or 3 times a sec) pulse or lurch as if some one is lightly tapping the accelerator. If I take my foot off the pedal or accelerate a little, the pulsing will stop. This seems to be limited to speeds above 25MPH. The problem has existed for about 4 months and is becoming more noticeable.

1. This problem has been around a month and might be further development of the first problem. When accelerating at lower, around town, speeds the car will stutter, about once a second, sometimes intermittently, until a steady speed is reached. This problem may exist at higher speeds but is not noticeable because the momentum masks the effect.

2 seems like an accelerator pump but, since its fuel injection, thats not it.

any ideas? Thanks Robert