Your Ford Fusion sometimes stalls when the engine is cold, but simply in that situation, and not at all when the engine is hot, and you have difficulties finding its origin? This issue, although less risky than an engine that stalls while driving, still deserves your attention because it could be the start of a more serious problem in the future.
In this article, we will inform you about the different problems you might face when your car stagger in cold start so that you can react more efficently and not necessarily go to the mechanic, which often charges a high price for the service and does not always solve the problem.

Different causes to stall for a cold engine.

First, we will explore failures associated with mechanical problems. The second part will be devoted to electronic problems.Stalls-when-cold-ford-fusion

1: Mechanical failures on your Ford Fusion

First thing to think about, the idle actuator. As a reminder, the latter’s role is to control the engine speed. It may be complex for the latter to connect to the engine while the engine is still cold.
Another simpler aspect, but also common in these cases, is that the battery is likely low, and therefore does not have many reserves until the engine has started. This means that after “heating” the engine, the battery has accumulated enough energy to keep your Ford Fusion on. However, it has difficulty maintaining autonomy once the engine is switched off. Which would explain why it only chockes cold.
Also keep in mind to check your dashboard, and if, by any chance, an indicator light is not lit.
However, if your car always starts the first time, it is very certain that it does not come from your battery.
If the battery is not concerned, look at some of the parts to be cleaned, such as filters, injection pump, or pressure regulator.
Keep in mind that a simple, heavily dirty part can break up the entire mechanism of your Ford Fusion. Check all your parts to be able to exclude this type of failure.
Once mechanical breakdowns and fouling have been put aside, let’s search for electronic parts that could cause you problems.

2: Electronic failures of your Ford Fusion

The first essential parts are the onboard computer. the MCU (Motor Control Unit) acts as a system for swapping and sending information throughout your vehicle. Electrical signals are received, processed and sent back as information to the various parts of your Ford Fusion.
For example, when you turn on your indicator, your MCU box receives the information, processes it, and then redirects it to your flashing room, which will then light up. We have used here the example of the indicator, which would not prevent you from driving. If this information was connected to the engine of your Ford Fusion, then in this case it may stall cold.
What’s more, let us speak about the calculator. This important part of your vehicle is a central part of a system called an embedded system. This means that it electronically manages the various functions of your vehicle, and therefore the ignition of the engine.
Find out more about this part if you have any questions about it.

Directly linked to your computer, the TDC sensor.

Actually ,the internal combustion motor must have a precise ignition timing setting to be able for all the cylinders to fire in the correct order and at a specific moment. If the TDC sensor is damaged, it will not transmit this information to the onboard computer. Therefore ,, as a safety measure, the ECU will stop the ignition system and your Ford Fusion won’t start.

At last, you could possibly want to verify your alternator.
It is essential for the engine to start because it turns the battery on, and the engine producesthe electricity required to keep the battery charged when you drive.
This means that ultimately you could have a battery problem. If your alternator does not provide enough electricity to your battery, it will, in turn, be unable to keep your Ford Fusion on.

3: Conclusion

As we have seen in these various motives of cold stalling cars, this often leads back to the battery or directly affiliated parts. However, this could not be the only reason, do all the required tests to analyze the appropriate functioning of each part. At last, the last thing to think about with Ford Fusion is to ask yourself this question: have you recently started refuelling at a new gas station? In this case, it may be inadvertently degraded due to contact with water or impurities. This would impact your engine, which could start to stall quickly.
However, if this does not appear once your engine is hot, then the impurity of the fuel is exonarated. The problem would be repeated no matter if your engine is hot or cold.

Hoping to have been able to enlighten you about the various potential failures, do not give up in your research if you have not yet found.

If you have any additional questions about the Ford Fusion, do not hesitate to consult our Ford Fusion category.