Backfire on deceleration?

If memory serves, a little bit of a hunting / non-smooth idle, perhaps a bit of acceleration lag. It would have to be REALLY off, I would think to cause any real drive ability issues (though it is possible to create a no start). If you get a chance to put a scanner to it, get it as close to 0 degrees, as possible, you may see it toggle back and forth, between +/-, and 1 and 0- pretty normal. If its all over the place, start looking for worn distributor parts, intermediate gear / shaft bushing, etc. in order to set and check it accurately, the computer has to be put into the proper mode, don't go by the sensor readings / normal screen pids, because the computer is altering that number constantly.