2011 ford fusion 2.5l wrench light misses on all cylinders

Question

Wrench light on dash no codes misses on all cylinders

Answer 1

Misses on all cylinder.When Ford does not give a code the use use of a scan tool that has power balance data becomes helpful. But this is function test are available for pricey scan tools. Most misses on cylinder are igntiion related, depending on the ignition system the Ford Fusion uses. there is the COP (Coil on plug) which is the most common, then there is the coil pack which are in very few Fusions.

Here is a little miss that a vehicle owner complained of, it was mostly felt when the a/c was on and at a stop. There was no codes . Upon inspection having a COP (coil on plug) inspecting the sparkplug well revealed the reason for the sublte misfire the valve cover seep oil into the sparkplug well.The fix here was a valve cover gasket a set of sparkplug boots and due to mileage the sparkplugs for maintance