So i purchased this car from this old couple. It say for a yr aroundish. It has this rough idle that I can't see to figure out. I've replaced fuel filter, spark plugs, and put in new gas. I've then cleaned the maf and throttle body but doesn't seem to help. From time to time it would pop a misfire cel in #1, 3 and 4 cylinders. Could it be a clogged up pipe? AVCS? doesn't sound to be knocking. https://www.facebook.com/video.php?v=1424903140870512
