runs this way all the time.
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1990 Nissan Maxima Question: Car starts but runs rough at idle. When you accelerate the engine smooths out?
Answer #1pushrod January 26, 2014, 12:04Master
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!