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Ford Fusion Losing Power When Accelerating? [ Reasons & Fix ]

Ford Fusion Losing Power When Accelerating? [ Reasons & Fix ]

While driving your Ford Fusion, you can experience power losses, and it is like an impression of a vehicle jerking or grazing whenever you press the accelerator pedal. It can become stressful as it is risky on the highway and depicts your vehicle’s engine is damaged.

However, it becomes difficult to know the exact cause of power loss without knowing the dysfunction cause. Therefore, whenever a part gets damaged, it shows an impact on the entire system and could destroy the vehicle’s other segments. Read on to know the causes of power losses.

Ford Fusion Losing Power When Accelerating: Know The Reasons

To drive your Ford Fusion with engine problems or slow acceleration is stressful. It can also become dangerous when overtaking an intersection.

Slow acceleration can be a symptom of an underlying problem with your Ford Fusion that you need to resolve quickly before it poses more damage to your Ford Fusion. There are several reasons for losing power in your Ford Fusion while accelerating. They are as follows.

1. Clogging of air filters

If the air filters of your Ford Fusion become dirty, it could depict a negative impact on your vehicle’s engine performance. The passing of less air through the dirty filter causes suffocation of the engine.

It also increases fuel consumption, and in extreme conditions, the vehicle’s engine could fall if your vehicle’s air filter gets highly clogged. So, replacing clogged filters only takes a few minutes and does not need knowledge.

2. Dirty mass airflow sensor

The mass airflow sensor is a part of the engine’s intake system, located between the throttle valve and air filter box. This part is not only essential for power delivery in your Ford Fusion but also is essential for the lowest possible pollutant emissions.

Dirty or defective mass airflow sensors in your vehicle could lead to loss of power, erratic idling, uneven engine running, poor exhaust emission, and misfires, including black smoke.


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3. Clogging of fuel filters

If fuel filters get clogged in your Ford Fusion, then enough fuel will not be able to reach the engine. It will lead to jerking and loss of power in the vehicle during acceleration.

In worst cases, the engine entirely cuts off during driving because of insufficient fuel supply. This fuel filter prevents various debris and rust particles from the vehicle’s fuel tank to the engine.

If you do not change or follow the maintenance at the proper time, then the permeability of the filter drops off along with fuel pressure in your vehicle’s engine. If the fuel filter gets too dirty, the performance of your vehicle engine becomes less.

4. Clogging of a catalytic converter

A catalytic converter is an essential part of an exhaust system, and the primary function is to convert exhaust gasses that can be harmful to the environment and health into much less dangerous byproducts.

With time, harmful toxins get clogged up and accumulate in the catalytic converter, especially when your Ford Fusion gets racked up for a lot of miles. Clogged catalytic converters could lead to loss of power, improper working of the engine, poor fuel economy, and at times depicts rattling noises.

5. Faulty oxygen sensor

The oxygen sensor of your Ford Fusion greatly monitors pollutant levels in the engine’s exhaust gasses and quickly reports data to the control unit. It works continuously to adjust the air to fuel ratio in the engine.

If this oxygen sensor produces any fault, it will send inappropriate readings to the control unit, leading to loss of power, reduced acceleration, irregular idling, stalling, and engine hesitation.

6. Dirty throttle body

A dirty throttle body can also be one of the reasons for power loss when accelerating your Ford Fusion. The most common signs of this are erratic idle, poor engine performance, and the vehicle’s engine sputters easily.

Due to the dirty throttle body, the vehicle’s engine reacts very poorly to every movement of the accelerator pedal. Faulty throttle arises due to internal contamination, and its valve efficiently regulates the supply of air to internal combustion engines. With time, dirt could trap in the throttle body that escapes via the air filter and lead to improper throttle valve movement.

7. Fault in the throttle position sensor

This throttle position sensor helps determine the opening angle of the throttle valve, and this information goes to the control unit. It is helpful in the calculation of the fuel needed.

The reason for faulty throttle position sensors can be loss of power, low engine performance, fluctuations, engine jerking, and slow speed when you release the accelerator.

8. Malfunction of fuel pump

Ford Fusion’s fuel pump is the beating heart that appropriately pumps fuel to your vehicle’s engine. An improper fuel pump can lead to improper acceleration, power loss, engine jerking, and engine starting problem, resulting in reduced fuel efficiency.

9. Faulty spark plugs

If the spark plugs do not generate sparks efficiently in your Ford Fusion, the engine will not work appropriately. This feature often results in increased fuel consumption and loss of power.

It also results in engine jerking and improper running of the engine. If you continue to drive with faulty spark plugs, you can have some serious damage.


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10. Dirty fuel injectors

Fuel injectors come under the part of the fuel delivery system that can spray fuel in high-pressure form. With time, they get clogged because of hydrocarbons and sediments in fuel.

It cannot deliver an appropriate amount of fuel to the combustion chamber at the correct pressure. If there is a slight disruption in the combustion cycle, then it can result in the loss of power of your Ford Fusion.

11. Low compression problem

For a proper car engine to function and correct power to the vehicle, there should be cylinder compression throughout the combustion process.

If this compression becomes less, the engine’s power will become very low. Due to this, the engine will not be able to function appropriately. So, diagnosing low cylinder compression is of utmost importance for better performance of your vehicle.

12. Faulty ignition coil

The ignition coils present in the system highly serve as electronic engine management. It is responsible for converting low voltage power into high voltage one. But, if these ignition coils fail to work accurately, your Ford Fusion will not accelerate properly and result in power loss.

13. Worn out piston rings

Piston rings are sealing elements over the pistons of the internal combustion engine of your Ford Fusion, and the purpose of these piston rings is to keep the engine oil away from the combustion chamber.

When these piston rings get damaged, the combustion chamber of your Ford Fusion engine loses pressure. It ultimately results in a power loss of the engine, as the piston cannot compress the air and fuel mixture entirely.

14. Turbocharger problem

Turbo forces provide extra oxygen for increased combustion. But these turbochargers suffer from several issues that can impact your vehicle’s performance and lead to power loss of your Ford Fusion due to blockage.

How to fix it?

A vehicle’s engine produces power by using fuel and air combinations to get combustion. This energy is transferred to the wheels and makes the car move. It becomes the job of your Ford Fusion engine to perform the transfer of energy with brilliant efficiency.

However, due to several factors, the engine can lose power. You can only solve it via an efficient diagnosis of the problem. Below are some ways to fix the problem of power loss when accelerating.

  • To solve the issue of faulty fuel filters, firstly locate the fuel filter in your vehicle’s engine. If your Ford Fusion’s fuel filter gets clogged, make sure to replace it as soon as possible.
  • To fix the issue of clogged air filters, you need to replace them as the air filter provides your engine with clean air. These air filters prevent the entry of harmful particles and dust. If there is excess clogging, replace it.
  • In the case of a clogged exhaust system, you need to take care of its maintenance with the help of professional cleaners. It will help you in reducing contaminants that clog it.
  • In case of MAF sensor malfunction, you need to clean them up often. It helps in improving the engine efficiency and functioning and reduces power loss.
  • In case of faulty fuel injectors, you can use a good quality fuel system cleaner. These fuel injectors introduce fuel into the combustion chamber and maintain them.
  • Make use of Redex fuel additives to keep the fuel system clean and devoid the system from deposits and dirt that could result in blockage.
  • In case of a weak fuel pump, faulty fuel pumps need to be replaced. The fuel pump delivers fuel from the tank to your vehicle’s engine and needs to be highly powerful for proper functioning.
  • Do not avoid the performance dip of your vehicle and make sure to fix the problem as soon as possible as it would result in a less damaging impact.


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End Verdict

There are several reasons for power loss when accelerating your Ford Fusion. Regardless of the reason for losing power during acceleration, it becomes imperative to search for the solution rapidly.

Thus, when searching for the most appropriate reason, start with fuel supply and air intake problems. But, we will advise you to visit any professional for better performance as they can diagnose the power loss and slow acceleration problem quickly.