2012 Ford Fusion Throttle Body Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          40 minutes - 1 hour

Sections

Throttle Body
14 steps

Flags

In Progress

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What you need

Step 1

              Prepare the Vehicle

If the car has been driven recently, allow to completely cool as the engine will be very hot and there are bolts right against the block/radiator hose. Pop the hood and ensure it is securely held.

If the car has been driven recently, allow to completely cool as the engine will be very hot and there are bolts right against the block/radiator hose. Pop the hood and ensure it is securely held.

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Step 2

              Unplug Battery Connection

Using the 8mm socket, loosen the 8mm nut that holds the battery terminal on to the battery.
Be sure to push the cable far enough out of the way so it does not make accidental connection while doing additional steps.

Using the 8mm socket, loosen the 8mm nut that holds the battery terminal on to the battery.

Be sure to push the cable far enough out of the way so it does not make accidental connection while doing additional steps.

Step 3

              Drain PCM

Allow the PCM to drain by letting the vehicle sit for 10-15 minutes after disconnecting the battery before continuing.
Note: This is because electronic throttle bodies utilize a ‘sweep’ function that opens and closes the butterfly inside on occasion, and due to the large gear reduction, there is enough force to seriously injure/remove fingers if it were to perform a sweep while a finger was inside of the throttle body.

Allow the PCM to drain by letting the vehicle sit for 10-15 minutes after disconnecting the battery before continuing.

Note: This is because electronic throttle bodies utilize a ‘sweep’ function that opens and closes the butterfly inside on occasion, and due to the large gear reduction, there is enough force to seriously injure/remove fingers if it were to perform a sweep while a finger was inside of the throttle body.

Step 4

              Remove Airboot Clamp

Locate the clamp that connects the throttle body to the rubber air boot and disconnect the clamp using a flat head screwdriver or the 8mm socket (if applicable). If you have trouble finding the air boot, it is on the driver side and runs from the large airbox and ends at the throttle body

Locate the clamp that connects the throttle body to the rubber air boot and disconnect the clamp using a flat head screwdriver or the 8mm socket (if applicable). If you have trouble finding the air boot, it is on the driver side and runs from the large airbox and ends at the throttle body

Step 5

              Remove Throttle Body Plug

Disconnect the electronic plug on the front of the throttle body.
Note: There may be a red safety clip on the plug, it is easily removed by pulling straight upwards on it then the plug can be compressed and removed.

Disconnect the electronic plug on the front of the throttle body.

Note: There may be a red safety clip on the plug, it is easily removed by pulling straight upwards on it then the plug can be compressed and removed.

Step 6

              Remove Throttle Body Bolts

Locate the four 8mm bolts that hold the throttle body on and remove them. The rubber air boot is easily manipulated so that each bolt can be accessed without complete removal of the air boot itself.
Note: Due to the confined space, it may be best to use a small ¼ inch drive ratchet and 8mm to reach the lower bolt closest to the firewall.(#4 in photo)

Locate the four 8mm bolts that hold the throttle body on and remove them. The rubber air boot is easily manipulated so that each bolt can be accessed without complete removal of the air boot itself.

Note: Due to the confined space, it may be best to use a small ¼ inch drive ratchet and 8mm to reach the lower bolt closest to the firewall.(#4 in photo)

Step 7

              Remove Old Throttle Body

While manipulating the air boot, remove the defective throttle body from the engine and place the bolts in a place for safe keeping until reinstallation.

While manipulating the air boot, remove the defective throttle body from the engine and place the bolts in a place for safe keeping until reinstallation.

Step 8

              Remove Throttle Body Gasket

Remove the gasket that remains on the engine, due to the nature of the gasket it must be replaced any time the throttle body is removed.

Remove the gasket that remains on the engine, due to the nature of the gasket it must be replaced any time the throttle body is removed.

Step 9

              Replace Gasket

Replace the gasket that was removed in step 9 above with a brand-new gasket.

Replace the gasket that was removed in step 9 above with a brand-new gasket.

Step 10

              Reinstall New Throttle Body

Reinstall the new throttle body using the 4 bolts that were previously removed in step 7 above.
Note: Start by tightening the bolts in a crisscross pattern by hand, and then move in a crisscross pattern with the ratchet. Be careful not to over tighten one before the others as this will cause the other bolts to bind and be difficult to tighten.

Reinstall the new throttle body using the 4 bolts that were previously removed in step 7 above.

Note: Start by tightening the bolts in a crisscross pattern by hand, and then move in a crisscross pattern with the ratchet. Be careful not to over tighten one before the others as this will cause the other bolts to bind and be difficult to tighten.

Step 11

              Reinstall Airboot

Reinstall the air boot, take special care to ensure that the notch in the boot is seated on the tab of the throttle body. This helps ensure it is in the right place. Then tighten the clamp that holds the boot.

Reinstall the air boot, take special care to ensure that the notch in the boot is seated on the tab of the throttle body. This helps ensure it is in the right place. Then tighten the clamp that holds the boot.

Step 12

              Reinstall throttle body plug

Reconnect the electronic plug on the throttle body and insert the red safety clip back into place.

Reconnect the electronic plug on the throttle body and insert the red safety clip back into place.

Step 13

              Reattach Battery Connection

Reinstall the negative battery cable and tighten the 8mm nut that clamps the terminal to the battery post.

Reinstall the negative battery cable and tighten the 8mm nut that clamps the terminal to the battery post.

Step 14

              Retraining the PCM

Due to the draining of the PCM and replacement of the throttle body, the vehicle will have to be retrained to learn the appropriate idle and shift points. This MUST be done or the vehicle will not run correctly for some time because it will be forced to learn values over a longer period of time.
Step 1) Turn off ALL accessories in the car. This includes: automatic headlamps, radio, air conditioning, heated seats, etc. There should be nothing on!
Step 2) Turn the key, but DO NOT START! Allow all the gauges to cycle (4-5 seconds) and then start the car.
Step 3) Allow the car to idle for 10-15 minutes so that it can get to operating temperature and train the idle accordingly. Failure to follow this step will cause idle hunt to occur.
Step 4) After 10-15 minutes have passed, take the car for a 10-15 minute drive to help train the shift points. Be sure to not drive the car overly easy or too hard as this will allow unrealistic shift points. Drive as you normally would.

Due to the draining of the PCM and replacement of the throttle body, the vehicle will have to be retrained to learn the appropriate idle and shift points. This MUST be done or the vehicle will not run correctly for some time because it will be forced to learn values over a longer period of time.

Step 1) Turn off ALL accessories in the car. This includes: automatic headlamps, radio, air conditioning, heated seats, etc. There should be nothing on!

Step 2) Turn the key, but DO NOT START! Allow all the gauges to cycle (4-5 seconds) and then start the car.

Step 3) Allow the car to idle for 10-15 minutes so that it can get to operating temperature and train the idle accordingly. Failure to follow this step will cause idle hunt to occur.

Step 4) After 10-15 minutes have passed, take the car for a 10-15 minute drive to help train the shift points. Be sure to not drive the car overly easy or too hard as this will allow unrealistic shift points. Drive as you normally would.

You have now replaced the throttle body and properly re-trained the PCM.

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                    Thomas

Member since: 06/12/2019

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Darren Devoid - Sep 25, 2021

My 2012 Fusion really started to act up in a matter of minutes!I started my car and within 90 seconds it was a wrap.It was like the transmission went out with no prior indication.The car would not move and the engine would accelerate to the point where I shut it down.(It reved up to 6 on the RPM GAUGE and would have kept going.Why?

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