Your Nissan Altima frequently stalls when the engine is cold, but simply in that situation, and not in any way when the engine is hot, and you have trouble finding its origin? This situation, although less serious than an engine that stalls while driving, really needs your attention because it could be the start of a more significant problem in the future.
In this article, we will inform you about the various 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 get rid of the problem.
Different reasons to stall for a cold engine.
First, we will discuss failures linked to mechanical problems. The second part will be focused to electronic problems.
1: Mechanical failures on your Nissan Altima
First thing to think about, the idle actuator. As a reminder, the latter’s role is to control the engine speed. It may be difficult 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 probably low, and therefore does not have many reserves till the engine has started. This means that after “heating” the engine, the battery has stored enough energy to keep your Nissan Altima on. Even so, it has difficulty keeping up with autonomy once the engine is switched off. Which would explain why it only chockes cold.
Also bear in mind to check your dashboard, and if, by any chance, an indicator light is not lit.
Then again, if your car always starts the first time, it is very likely 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.
Take into account that a simple, heavily soiled part can break up the entire mechanism of your Nissan Altima. Verify 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 Nissan Altima
The first important parts are the onboard computer. the MCU (Motor Control Unit) acts as a platform for exchanging and dispatching information throughout your vehicle. Electrical signals are received, analysed and sent back as information to the various parts of your Nissan Altima.
For example, when you activate 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 linked to the engine of your Nissan Altima, then in this case it may stall cold.
Furthermore, let us speak about the calculator. This important part of your vehicle is a central component of a system called an embedded system. This means that it electronically deals with the various functions of your vehicle, and therefore the ignition of the engine.
Find out more about this part if you have any doubts about it.
Directly linked to your computer, the TDC sensor.
In fact ,the internal combustion motor must have an accurate ignition timing setting in order for all the cylinders to start in the correct order and at a specific moment. If the TDC sensor is ruined, it will not send this information to the onboard computer. Consequently, as a safety measure, the ECU will prevent the ignition system and your Nissan Altima won’t start.
Finally, you may want to check your alternator.
It is necessary for the engine to start because it turns the battery on, and the engine producesthe electricity needed to keep the battery charged when you drive.
This means that indirectly you could have a battery problem. If your alternator does not provide enough electricity to your battery, it will, consequently, be unable to keep your Nissan Altima on.
As we have seen in these various causes of cold stalling cars, this often leads back to the battery or directly matching parts. However, this may not be the only explanation, do all the necessary tests to analyze the appropriate functioning of each part. Finally, the last thing to think about with Nissan Altima is to ask yourself this question: have you fairly recently started refuelling at a new gas station? If so, 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 immediately after your engine is hot, then the impurity of the fuel is exonarated. The problem would be recurrent 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 need more tutorials on the Nissan Altima, go to our Nissan Altima category.