Car starts but runs rough at idle. When you accelerate the engine smooths out? on 1990 Nissan Maxima

runs this way all the time.

Asked by for the 1990 Nissan Maxima
Sound like a vacuum or low compression problem. Possible valve not seating or burnt, check compression. Possible vacuum leak have a smoke test of the vacuum circuits performed. Either problem will be more pronounced at idle and decrease with rpm!