1959cortina

bad missfire sounds its running like on 3 cylinders,replaced all spark plugs and all coils.any clues

iideadeyeii

iTrader: (6)

It's misfiring on multiple cylinders.

Subd

are the cylinders all dry, do the spark plugs have oil on them, the seals on the rocker cover that go around the spark plug tubes can leak oil, causing misfires,

other reasons

air/fuel mixture
injectors
did you take the wiring off maybe hooked it back up wrong,

did you do any work to the engine, besides coils and spark plugs,