1997 mercury g.marquis 4.6 problem code po304 cyl. #4 misfire problem seems to be intermitten new plugs new wi
Answer
This vehicle has a distributorless ignition..
1-replace plug
2-replace wire
if you have done this and it is still misfiring
3-replace ignition module
if this doesnt work it may be a pcm problem..
nice
luck to you