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Daunting reasons for Engine misfire

Daunting reasons for Engine misfire

Snapshot: Engine misfire does sounds like a nightmare, but it will not necessarily cost you a pack of money (until you kill your engine). Here are some symptoms that might help you to know the issue.

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Engine misfire can be a frustrating problem, and details circling around this issue might sound like a nightmare, but it isn't. Engine misfire can occur due to many varying symptoms, but the result nevertheless is same, delayed power delivery. The problem can be intermittent or repetitive, need not to worry, it won’t cost you fortune (to some extent) to rectify it.

the question here is that how will you notice know that the vehicle is suffering from this trouble? Modern cars have sensitive sensors to detect if one or more cylinders start to misfire and immediately trip the “check engine” light. Some cars are also equipped with misfire correction mechanisms that can modulate the timing on bad cylinders so as to correct for the misfire. However, in older cars or the ones without these sensors, you will hear a loud noise at the instance of misfire, if there is a severe engine misfire while driving, you may feel jerks and exhaust properties will change that can be seen visually. Before we go any further, let’s understand what is engine misfire.

Conventional engines, be it petrol or diesel fuel have multiple cylinders to ignite fuel, when introduced in it. Further, the hot gases produced from the combustion helps the car get motion. Misfire occurs when one or more of the cylinders of an engine fails to go with the correct firing order. This is due to heckling of the air-fuel ratio in the combustion chamber of the said cylinders. Thereby, resulting in loss of power, reduced fuel efficiency and increase in emission output, CO2 namely.

Here are three things that are considerably important – the amount of fuel and oxygen to burn it along with a spark that would ignite this mixture. Insufficiency of any of these will cause a misfire, while the issue is not limited due to these only and other possible reasons could be vacuum leaks, worn out valve spring and incorrect ignition timing. Let’s continue on some of the engine misfire symptoms and their causes.

Check Ignition System – Parts that that you need to look into this system are spark plugs, ignition wires, and coil packs that wears or corrodes. These parts have a specific lifetime and need replacement over time. And a time comes when the spark plugs don’t get enough electricity to create sparks, if any of these parts starts to wear or to some point damaged. This causes intermittent misfires and might be worse over time. Most of the ignition parts are not that expensive and is easy to fix as well.

Check Fuel System – If you are relieved that there is no problem with the ignition system, the next check will be for the fuel system components. You need to check for dirty fuel injectors, clogged fuel filter, malfunction of mass airflow sensor or fuel pump. These components also wear out, but at a slower rate. Also check the EGR valve that could stick, if not cleaned for a long time, where in this case, you are allowing the exhaust wastage to enter the chamber through intake valve, unintentionally.

Damaged Cylinder

While you are driving, you might hear loud noise like a sneezing or could be a popping sound during engine misfiring. Sometimes, you can smell a very peculiar smell too, which come from the mix of fuel coolant and steam. This odour is a straight warning for the damaged cylinder walls and better to take the car to a mechanic to inspect the engine soon.

Should you Drive When an Engine Misfires?

It is not dangerous, if you are driving with an engine misfire, but you never know about the situation. With time, it could become worse and ignoring the problem for too long can damage other engine parts such as the oxygen sensor and catalytic converter. Surely, you don’t want to get stuck in the middle of a busy, running road, due to loss of power. It also increases emissions and decreases fuel efficiency. So, it is suggested to take the vehicle to a professional before killing the lifespan of the engine.

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