I have a 1993 1.6l nissan nx. I bought it in a questionable decision on ebay. I've gotten it running quite a bit more smoothly, but I am still having one problem:
When I accelerate when the engine is warm or hot, the car really shudders and loses some power. This does not happen when the engine is cold. When cold, the car runs great and smooth as can be. When running at 60-65 or so, the engine is fine; it is only when accelerating.