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Message: <blockquote data-quote="cammed sn95" data-source="post: 989655" data-attributes="member: 16654">so i have a missfire or something is not right. feels like im not firing on all cylinders.The car revs up choppy and as im driving off from 1000rpm-2000rpm it feels rough then it clears after2k rpms but if i mash the throttle it feels weak, so its def making me lose some ponies. Also when the car is inlow rpm in 5th gear from 1000-1500 doing about 50mph the engine and my shifter shakes really bad, it didnt used to do this at all. The problem only used to occur only when the car was warm, cold it would run perfect, now the problem is there at all times <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" /> Things ive replaced;Maf sensorACT sensorEct sensortps sensor(when i switched this, car ran good for about 4 days then prob came back)cap & rotorspark plug wiresSpark plugs look goodTried different coils with a friend, didnt helpPut new K&N filtertiming is at 15 (no pinging)fuel filteralternatordizzy is fairly newo2s are about 6months oldWhat could be causing this guys? ive spent countless hourstrying to figure out what the problem is and i cant seem to fix itits stressing me the hek out.help would be really appreciated!!</blockquote>