I have a catera and i fried the ECM so i bought one from a junk yard and after i got it flashed it started missing on 3 cylinders. so i bought a coil from a junk yard because a new one is so expensive and it acted fine for a little while and than started missing. than the next day it ran fine and than all the sudden it misfires on every cylinder. it act likes it has no power what so ever. you give it gas and it wants to die.. plus i found a hard plastic hose after i replaced the coil and i cant find out where it goes, maybe a vent tube for tranny?.. does anybody have any idea what the problem is? any help would be greatly appreciated.