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Ford Fusion Engine Spark Plugs Replacement Guide
How to change the engine spark plugs in a 2nd generation 2013-2016 Ford Fusion with the EcoBoost 2.0L Turbo I4 motor.

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2014 Fusion 2.0L Turbo I4
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Pull Off Plastic Engine Cover
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Engine Cover Removed

This automotive maintenance tutorial was specifically written to assist owners of the second generation (2013, 2014, 2015, 2016 and maybe also the revised 2017) Ford Fusion sedan in checking or changing the engine spark plugs in the EcoBoost 2.0 liter inline turbocharged four cylinder motor.

Owners of other Ford or Lincoln vehicles such as the Focus, Fiesta, C-Max, Mustang, Escape, Transit Connect, Edge, Flex, Explorer, Expedition, Taurus, F-150, EcoSport, MKC, MKZ, MKS, MKX, MKT and the Navigator may also find these DIY instructions to be helpful.

The OEM spark plugs in this 2014 Fusion Titanium with the EcoBoost 2.0L Turbo I4 engine are Motorcraft part number CYFS-12Y-2, CYFS12Y2 or Motorcraft SP537.

The tools needed to complete this procedure include a flathead screwdriver, a deep well 13mm socket or a 13mm wrench, a deep well 8mm socket or an 8mm wrench, a ratcheting wrench, a pair of needle nose pliers, a 5/8" spark plug socket, an extension bar, a 3/8" drive ratcheting wrench and a tube of dielectric grease.


A few other compatible replacement spark plugs for the EcoBoost 2.0L Turbocharged I4 motor with their part numbers are as follows: Autolite XP5363 Iridium XP (Gap .030), Pulstar ef1h10, Autolite XP5863, and Champion RE10PYPB5 (7437).

Some compatible spark plugs for the 2.5L i-VCT I4 naturally aspirated engine include the following: Autolite XP5364 Iridium (.051 gap), NGK (5019) LTR5GP, NGK (4344) LTR5IX-11, Motorcraft SP-530, ACDelco 17 (88879892), Autolite APP5364, Champion RE10PMC5 (3032) and Champion RE10PYPB5 (7437).

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EcoBoost 2.0L Engine
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Air Intake Assembly
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Loosen Counterclockwise
The first step is to pull off the plastic engine cover.

It is held in place by four rubber friction fasteners on the underside attached to metal pegs on the top of the engine.

Set the engine cover aside in a safe place.

If you have access to compressed air or a wet/dry shop vacuum, thoroughly clean off the top of the engine to help reduce the risk of having debris fall down in to the cylinder while you are replacing the spark plugs.

Then loosen the metal hose clamp on the air intake located in between the 2nd and 3rd spark plugs by turning the screw counterclockwise with a Phillips head screwdriver.

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Remove 13mm Bolt
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13mm Bolt Removed
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Pull Off Vacuum Tube
Remove the bolt that secures the air intake assembly to the top of the engine by turning it counterclockwise with a deep well 13mm socket or a wrench.

I had to use an adjustable crescent wrench to remove the 13mm bolt.

Set the 13mm bolt aside in a safe place.

Press the release button on the small vacuum line and pull it off the front of the air intake hose.

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Tube Removed
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Pull Out Air Intake Hose
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Push Air Intake To The Side
Gently separate the air intake hose from the engine.

Move the air intake towards the right side of the engine bay away from the spark plug ignition coils.

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Pull Off Plastic Loop
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Loosen 8mm Nut
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Press In Release Tab
To access the bolt that secures the first spark plug ignition coil on the left side, you'll have to first pull off the plastic loop attached to a wiring harness.

Use a pair of needle nose pliers to gently pull the plastic loop off the top of the bolt.

Loosen the ignition coil bolt by turning it counterclockwise with a deep well 8mm socket and 1/4" drive ratcheting wrench.

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Pull Off Power Plug
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8mm Ignition Coil Bolt
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8mm Bolt Removed
Set the 8mm bolt aside in a safe place.

Press in the release button on the electrical connector before sliding the plug straight out of its socket.

I'd recommend only checking or changing one spark plug at a time to help further reduce the chance of having something fall down in to the engine.

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Lift Out Ignition Coil
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Spark Plug In Well
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5/8" Spark Plug Socket
Rotate the ignition coil back and forth a few times to make sure that the rubber dust boot at the end of the coil is not stuck or "frozen" to the top of the old spark plug.

Gently pull the ignition coil straight out of the spark plug and set it aside in a safe place.

Attach the 5/8" spark plug socket to a 6" extension bar and the 3/8" drive ratcheting wrench.



 

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Loosen Counterclockwise
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Spin Out Old Spark Plug
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Inspect Old Spark Plug
Lower the 5/8" socket in to the well and attach it to the top of the old spark plug.

Loosen the old spark by rotating it counterclockwise.

Try to avoid using excessive force to loosen the old spark plug to prevent from cracking the ceramic portion of the plug.

If you have trouble loosening the old spark plug, spray a small amount of penetrating oil such as PB Blaster, Liquid Wrench or Kano Kroil and wait at least 15-30 minutes before attempting to loosen it again. If you don't have any penetrating oil, try spraying some WD-40 or warm up the engine for a few minutes to help expand the metal engine block.

Once the old spark plug is loose, detach the ratcheting wrench and spin it out the rest of the way by hand.

Lift the old spark plug out of the well and detach it from the socket

Inspect the old spark plug.

If the electrode end of the old spark plug looks ashy white, the plugs may have been exposed to high temperatures due to overheating or they might be the incorrect heat range for your driving conditions or environment.

On the other hand, if the old spark plug is grey or covered in dark black soot, the engine may be burning oil and should be examined by a professional mechanic.

(An optional step is to apply some anti-seize grease to the threads on the spark plug. Most spark plug manufacturers recommend that you should not use anti-seize grease since it can lead to over tightening. Some mechanics believe that using anti-seize grease on the spark plugs will help prevent them from becoming stuck or "frozen" in to the cylinder head if they are not removed again for 100,000 miles.)

If you have a spark plug gap gauge, check that the new spark plugs are gapped to the manufacturer's specification listed on the side of the box. They should be pre-set from the factory, so don't worry if you don't have a gap gauge.

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Lower In New Spark Plug
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Tighten Spark Plug Clockwise
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Apply Dielectric Grease

The OEM spark plugs in this 2014 Ford Fusion Titanium with the EcoBoost 2.0L Turbo I4 engine are Motorcraft CYFS-12Y-2, "CYFS12Y2" or Motorcraft SP537.

Push the new spark plug in to the socket and lower it down in to the well.

Your spark plug socket should have a rubber insert or a strong magnet to hold the new plug securely in place.

Spin in the new spark plug by hand in the clockwise direction until it makes contact with the cylinder head.

Attach the 3/8" drive ratcheting wrench to the extension bar and continue tightening the new spark plug in the clockwise direction.

If you are re-installing the old spark plug, tighten it to just a very small fraction of a turn past hand tight.

If you are installing a brand new spark plug, tighten it to just past the point when you feel the new crush washer collapse.

Do not over tighten the spark plug to prevent from cracking the ceramic body or stripping the aluminum threads.

Double check that the new spark plug is tight before moving on to the next step.

Apply a small amount of dielectric grease to the opening in the rubber dust boot at the bottom of the ignition coil.

The dielectric grease will help keep out any moisture and prevent corrosion (rust) from forming.

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Re-Insert Ignition Coil
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Rotate Back & Forth
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Spin In 8mm Bolt
Lower the ignition coil down in to the spark plug well and over the top of the new spark plug.

Rotate the ignition coil back and forth a few times to help spread the dielectric grease.

Spin in the 8mm bolt a few turns in the clockwise direction to prevent it from becoming cross threaded.

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Tighten 8mm Clockwise
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Push On Electrical Connector
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Spark Plug Replaced
Tighten the ignition coil bolt in the clockwise direction with the 8mm socket and 1/4" drive ratcheting wrench until it is snug.

Try to avoid over tightening the bolt to prevent from cracking the plastic ignition coil housing.

Push the electrical connector straight in to its socket until it clicks securely in to place.

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Move Air Intake To Left
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Re-Attach Air Intake Hose
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Re-Insert 13mm Bolt
Carefully move the plastic air intake hose back over to the left and re-attach it to the engine.

Re-insert the 13mm bolt and tighten it in the clockwise direction until it is snug.

Tighten the Phillips head screw on the air intake hose clamp by turning it clockwise.

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Tighten Clockwise
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Push On Vacuum Tube
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Vacuum Tube Replaced
Push the small vacuum tube back in to place on the nipple attached to the front of the air intake hose.
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Air Intake Re-Installed
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Push On Engine Cover
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Engine Cover Replaced
Line up the plastic engine cover and firmly push it back in to place.

Start the engine and listen for any strange sounds which may indicate a problem such as a disconnected power plug or a loose spark plug.

Be sure to record the spark plug change in your car's service records.

For more, check out my other 2013-2016 Ford Fusion DIY Repair & Maintenance Guides.
 

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