just bought a 93 civic has a b18a1 in it, when i first got, at 2000 rpm it would surge up and down on the rpm, after that was fine, yesterday it started doing that at 4000 rpm and after i would hit that the car would run like crap for a minute, now it has a constant miss, almost like i sucked in some dirt or something? Fuel filter? all my vaccum lines are messed up too and every diagram i look at isnt for my car, still wont rev past 4000. my egr isnt hooked up either and i found alot of plugs in the wire harness not plugged into anything, nothing matches up, am i better off to just by a new motor? But the trans has been changed too so???