WHAT CAUSES ENGINE MISFIRE, TOP 6 REASONS FOR ENGINE MISFIRE

WHAT CAUSES ENGINE MISFIRE, TOP 6 REASONS FOR ENGINE MISFIRE

If you have engine misfire and you are trying to figure out what causes engine misfire in this video we will explain the top reasons that usually cause engine misfire and how to fix engine misfire. It is important if you have engine misfire to fix the problem as soon as possible because if engine misfire is left unfixed it could cause sever damage to your engine and catalytic converter / exhaust system. In this video we are going to demonstrate the top 6 reasons that causes engine misfire based on our experience at the garage. Engine misfire is one of the most common problems with gasoline engines and most of the times it is somethings simple such as spark plug or ignition coil causing engine misfire however, if not fixed it can damage valves, lose compression, damage oxygen sensor, catalytic converter.

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We, Auto Repair Guys, are not responsible for property damage or injury incurred as a result of any of the information contained in this video. Information given in this video does not guarantee the desired outcome. Any injury, damage or loss that may result from improper use of the tools, equipment, or the information contained in this video is the sole responsibility of the user and not Auto Repair Guys.

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[goldwolf]

1) spark plugs - check gaps and brand
2) ignition coils bad - replace coil
3) oil on coils - oil well gasket, clean well
4) water on coils from washing
5) water in fuel line/injectors
6) bad pcv valve

[davisbrewer]

Good job explaining the possibilities for random misfire. You possibly hit on the one thing that I was suspicious of, and that was the chance for water to leak into the coil channel at time of washing the engine. My E550 with M278 engine was running fine before I did some minor repairs around the front of the engine and washed the dirty engine with garden hose. I will look into the coils for traces of water that could be causing the random misfire. Much thanks for mentioning the possibility of water inside the coil channel.

[Jakemott]

Great video! Very informative, a not so common one would be a clogged catalytic converter. That will create a incomplete combustion with detonation and misfires.

[silvialozano]

Thanks so much for taking the time to help others. Bless you and your family long happy prosperous lives

[Engineerboy]

You forgot one of the main reasons, a bad or clogged fuel injector or bad fuel injector connector. Also failing fuel pump or fuel pressure regulator causing low furl pressure.

[daewonshaun]

Great video, made it very easy to see everything clearly with the engine on the stand.

[johnrobertpostrado]

What about the distributor? Could it be also that cap and rotor problem that causes misfire?

[pabsime]

Great video. You forgot to mention to stop pressure washing your engine bay if that is your cause. Bad idea. Can lead to several immediate or long term issues. Unfortunately whoever needs to hear this can't because they have taken their phone into the shower too many times and can't drive to the store to fix it either.

[andriesmaila]

Good day. I drive 2000 BMW 330i. The vehicle started having stall movements especially poor taking off. Loosing power. The idling started going from smooth to.bad idling as if is a diesel but is a petrol. The vehicle is shaking badly when it idles. Smells fuel as if there is a leakage. Battery power live terminal gets very hot in a way that it leaves burn marks. Check engine light os on. What could be a problem with my vehicle?

[trini_boi]

Got a code for a misfire and found out it was a cracked coil but I'm still getting a rough idle..going to drive around and see if the check engine light would come back on btw good video👏🏽👏🏽👏🏽

[rock_]

Hi, Thanks for the video, I have toyota corolla petrol 2002, one day the engine light came on and start loosing power (i had to high rev to drive the car), took to mechanic but the his computer cant read any code, not sure what else i can do. on low speed the engine light stays on but when i go high speed the engine light start fleshing and exhaust noise is a bit loud and feels like miss fire. any guess please?

[jamesmullins]

Hi great video but you missed reason 7 and that's because oil gets on the plug or plugs resulting from worn oil rings which allow oil to come up pass the oil ring and soak your plug or plugs with oil causing a misfire, just thought that I would add that because that's what happened to my 2005 Chevy Trailblazer.

[georgebanana]

Another great video. Explanation is clear and easy to follow.

[TV-චින්තක]

Hey bro... May I know about the fuse in the ignition coil?

[hazelstreet]

One of my ignition coils went bad after 60k miles in my Honda, so I replaced all the coils and spark plus. It was running perfect again, until two months later. When I accelerate to about 5k rpms the engine misfires until I let off the gas. Then sometimes qt idle it will barely misfire. No check engine lights go on though. What could it be? Did I not screw in a spark plug tight enough?

[sylvesterstorer]

Do you have any nissan v6 engine I would like to see the colour code for the wire on the sensor for the air intake

[AsiaRoadTrek]

What do you think the issue is when I the car has slight misfiring, slow lost of coolant, smell light coolant odor, old spark plugs 180k, can overheat sometime? thanks

[samoniumuziejus]

I got ruffly 40000 misfires on each cylinder but the car still pulls fast.. and shows no error codes, not sure if I should try fixing it =D

[danielvaher]

Hi do you know what is the problem with it having a misfire when cold and a tappets noisy 3.5 v6 petrol getting a code p0303 cylinder 3 misfire. Thanks