2005 Mercury Monterey Q&A
2005 Mercury Monterey Question: Misfire cylinder 4, it can get pretty severe. Violently shaking the van.
Repair misfire on cylinder number four! Possible causes are: coil pack, spark plug, spark plug wire, fuel injector, vaccum leak or low compression. - pushrod
Hi, there is most likely only a few reasons why misfire is occurring, spark plugs,wires,coil,injector or Bad valve have you done anything other than change oil? - paylessauto
Has the #4 spark plug been inspected for oil fouling? Possible sticking rings. Maybe , next oil change , try adding a quart of Marvel Mystery Oil , instead of a quart of regular oil & see if that helps. - ziptie12