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300zx misfire..
i just recently bought a 93' 300zx convertible. when i bought the car i knew it was gonna need some work, it had a slight miss when i had first bought it so i figured changing the spark plugs would fix that, changed the spark plugs and now the miss is still there. sometimes when i start the car car it idles around 200-300rpm, but doesnt stall out. if i rev it, then it will go up to 900-1000 and stay there. at idle it still has a vibration and feels like a bumby and rough acceleration all the way up to 3000rpm, any ideas on what it might be?
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