Is there a problem of car misfiring at idle in your car too, then you have come to the right place, in this article we will give you complete information related to misfire.

Just a few days ago we got a diesel car, that car owner said that the engine shakes a lot, a lot of vibration is felt inside the car.

Looking at this problem, we checked the car and we found that there is a problem of misfiring in the engine of that car, due to which the engine is shaking, today we will give you complete information about misfiring and at the end of the article, you will get the problem of misfiring of that diesel car. will tell about

what is car misfiring at idle

car-misfiring-at-idle

misfiring occurs in the engine of the car, due to which the engine of your car starts shaking, 1 or 2 cylinders of the engine stop working and this is due to changing the timing of the fuel supply.

The engine of the car needs fuel at the right time for the right work, the injector of the cylinder whose piston comes on top supplies the fuel, similarly all the fuel injectors spray fuel when the piston comes up.

For this purpose, the engine has crankshaft sensor, camshaft sensor and ecm for both of these signals.The crankshaft sensor is mounted on the top of the crankshaft, when the crankshaft rotates, the crankshaft sensor sends a signal to the ecm.

And tells the ecm that the piston of the 1st cylinder has come to the top and the ecm sends a signal to the injector and the injector sprays fuel over the piston, thus when the 2nd piston comes to the top, the crankshaft sensor sends a signal to the ecm. is on and the ecm sprays fuel from the number 2 injector and this keeps happening

But when for some reason one or more injectors do not spray fuel on the piston or start spraying fuel before time, then that cylinder does not work, due to which misfiring occurs, the engine starts shaking and this problem is called car misfiring. at idle is called

Read in Hindi – P0302 Cylinder 2 Misfire Detected problem in hindi

causes of misfiring at idle

There are many different reasons for misfiring at idle in the car and all the reasons are related to the supply of fuel, know about all those reasons.

(1) . due to injector failure

The first reason for misfiring is the deterioration of the injector or dust coming in it, the injector of the cylinder in which the dust accumulates, the injector of that cylinder does not spray fuel on the piston, due to which the cylinder does not work, due to which the engine The power of 1 cylinder is lost, the pickup is reduced.

(2) . plug failure

The problem of misfiring also occurs due to plug failure. When the injector sprays fuel on the piston, the current released from the plug burns the fuel and blasts it, which keeps the engine started, but if for some reason the plug of 1 cylinder gets damaged. So the fuel will be sprayed in that cylinder, but due to the plug being damaged, that fuel will not burn, which will cause the problem of misfiring.

(3). due to plug coil failure

In case of misfiring, the coil on top of the plug has a big hand because the current to the plug is received from this coil and the current to this coil is sent to the ecm by the signal received from the crankshaft. Due to which the fuel does not burn inside the cylinder and the cylinder does not work, misfiring occurs.

(4) . head valve leaking

Even if the head valves of your car’s engine are damaged, there will be a problem of misfiring in your car because the head valves help in maintaining compression in the engine, when the piston comes up, the head valves are closed.

At that time a lot of pressure is created on the piston, which increases the temperature of the fuel and burns the fuel, but when the valves of the head get damaged, the valves leak, which causes the compression on the piston to leak, which does not work in the cylinder. and misfiring occurs

(5). Caused by dust in throttle body

One reason for misfiring is dust in the throttle body, clean air enters the engine through the throttle body, which burns by mixing air and fuel, but when there is a problem with the throttle body, air does not enter the engine, due to which only fuel burns. and misfiring occurs

(6) . broken injector wire

One reason for misfiring is the wiring problem. If any injector wire breaks, then the injector stops working and does not spray fuel on the piston in the cylinder, due to which misfiring occurs, so it is necessary to check the wiring. goes

(7) . due to dust in ecm

One reason for misfiring is the ecm itself, we have seen in many cars that the ecm stops supplying the injector, due to which the injector does not spray fuel, in this case it is necessary to check the ecm as well, it is very rare. spoils but needs to be checked

These are all the main reasons for misfiring, due to which misfiring can happen in your car.

symptoms of misfiring at idle

After misfiring in the car, different symptoms appear, about which you will get to see below.

(1) . check engine light turns on

Whenever misfiring occurs in the car, the check engine light turns on in the dashboard of the car and this light indicates us to get the car scanned and this light means that there is a problem with the car.

(2) . engine vibrates

After misfiring, there is vibration in the engine of the car, due to which the engine shakes, when we sit inside the car, there is a lot of vibration, the steering shakes.

(3). power goes down

When there is misfiring in the car, one cylinder stops working, then the power of the engine becomes very less, whenever we run the car, it runs in speed after a long time.

(4) . starting becomes hard

One of the symptoms you will see after misfiring is starting hard when fuel does not burn in any 1 cylinder or there is no fuel spray then starting becomes very hard the car does not start quickly

(5). Black and white smoke problem

After misfiring, the problem of black and white smoke occurs in your car because the fuel does not burn properly, the cylinder does not work, due to which smoke comes out of the exhaust.

The symptoms mentioned above appear after misfiring in the car.

how to fix car misfiring at idle

How to fix the problem of misfiring, do you know what you can check

(1) . check plug

(2) . check injector

(3). check injector wire

(4) . check head valve

(5). check ecm

(6) . check throttle body

You can check all these parts in case of misfiring

disel car misfiring problem

The diesel car that came to us had an injector problem, the number 2 injector was not working, but when the injector was taken out of the head, the injector started spraying.

After that it was reinstalled in the car then it stopped working again so we checked the wiring supply of all the injectors and found that there is a problem with the wiring of injector number 2.

For that we took out the entire wiring of the engine and checked it was found that the wiring near the alternator was shot due to which misfiring was happening, that wiring was fixed which fixed the problem

conclusion

Hope you have come to know about the problem of car misfiring at idle and now you will not have any problem related to it, after misfiring you check all the things properly, you will get the fault, if there is any problem then you comment we will help you

Know the answers to some questions

Q . What is the main reason for misfiring?

ans . When there is no supply of fuel in any 1 or 2 cylinders, then that cylinder does not work due to which misfiring occurs.

Q . How many cylinders are misfiring?

ans . Misfiring can happen in any 1 cylinder and can also happen in all cylinders.