Basically the car started to shake like crazy at idle,not so much when under load,but at idle it misfires like crazy, so i had it cheked,and got the #8 cylinder misfire and another one, torque converter in off position,guessing need a new tranny.

as for the misfire,i changed the spark plugs,cleaned the oil from the coils (valve cover leaking a bit) and i am still having the misfire 2/3 times when it starts up.

is this the injector or coil?how do i know,and where is the 8th cylinder? closest to the driver?