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Why Does My Car Lose Power 

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 Why Does My Car Lose Power 

Why does my car lose power? In most cases, a loss of engine power will relate to a mechanical failure in your vehicle; however, the loss of power may also be due to an external factor such as high temperatures.

If your car is losing power while driving, there are a variety of different reasons which you can diagnose yourself. Here at OneHowTo we offer a number of possible answers to explain why your car loses power and give you some tips on how to fix the problem.

You may also be interested in: Why Is My Car Engine Light On

Your car can lose power because an injector has poor contact. If this is the cause of the problem you will notice that an exaggerated vibration will occur in the motor. We recommend that you maintain these parts well.

You can learn how to do this yourself by reading our article How to clean a fuel injector.


If your car is among those which have a turbo engine, something which is increasingly common, you may find it is this element that is responsible for the loss of power. It may be that a tube connector is damaged or simply dirty or poorly adjusted. The fault can also occur because the valve that regulates the turbo does not work properly.


If you put on the air conditioning your car will lose power. You will notice this especially if you do a road trip, or with a smaller vehicle used primarily for city driving. If you are overtaking whilst going uphill and have the air conditioning on, you will notice how the engine can feel like it is losing power. So be aware that the air conditioning will use of some of your engines available power factor when driving.


The cause of the car's power loss can be an overloaded cooling system. Under these conditions, generated by very high external temperatures, the fan has to act at peak performance. This takes away power to the rest of the engine equivalent to about 2CV.


For cars with an ECU (Electronic Control Unit), an error of this type can cause the car to lose power. In some cases the car may stop. This fault, which is not easy to solve, is due to the system which detects a mechanical error in the car without it actually existing, and gives the command to the engine to lose power or to stop in order to avoid an accident. Normally, after half an hour you can reuse your car normally, but you should go to a professional to repair the electronics.


If your car loses power when you accelerate or accelerates more slowly than usual, it could be that your catalytic converter may be blocking gases and thus not allowing your car to rev like it should. Visit a mechanic if this is the case. To check if your car is losing power because of the catalytic converter, you'll only need to pay attention for a rattle sound when you tap the catalytic converter lightly with a hammer or similar.

Another reason why your car loses power when you accelerate or doesn't do so when you press the acceleration pedal is because your fuel filter is bad.


If as well as experiencing a loss of power you have noticed that your car jerks or makes a sound like an airplane we have plenty of other articles to help diagnose your specific issue.


If you want to read similar articles to Why Does My Car Lose Power , we recommend you visit our Car Maintenance and Repair category.

Comments (47)

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Very useful
Ruby Russell
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I have a 2004 Volkswagen beetle and just put a new battery in ,, for about a month though whenever I push the gas to go it doesn't wanna go. I tap it and it goes fine.. Some days it doesn't act up.. What could it be
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i have a hyundai getz 1.4 2008 its been losing power.i have change the fuel filter in tank.due to every one saying its needing fuel .it ,went great the same day next morning i have no power cant even get the car to move and my foot is flat on fuel
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Have a 2005 turbo diesel manual terracan. Recentlty I have noticed vehicle loose power for about half a second then comes good. Not warning lights show. Prior engine had a stutter when idling. Can you advise
Rick Grech
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My car lost power while driving about 50MPH after driving only about one mile. It would not start at first. It started about 20 minutes later. The engine check light came on and the mechanic indicated the air mass filter needs to be changed. He did not think this was the cause for the car losing all power. What could it be?
Kindly change your fuel pump and you will be fine
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I have a Mercedes c220 & have had a problem with losing power but can't get to the bottom of the problem, it works great then all of a sudden decides to it wants to go on a go slow mode for no reason, I've noticed if I pull over & turn off the engine then start again it's fine & so on.
siamalonda clement
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what more makes my car with Electronic Control Unit lose power
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I recently purchased a mercedes benz E320. It is a 2003, and check engine light is not on. When driving sometimes it feels like its trying to lose power and now its accelerating slow. It comes and goes it will be driving fine and feels like losing power briefly and then picks up again and drives normally. Any ideas of what could be going on? Thank you
Edward Rosado
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I have a 2000 I30 Infiniti when I drive my car for a half hour the RPMs rev High and the car starts going slow does anybody know what could be the problem it would be really appreciated for someone to help
I had that problem with a vehicle in past it was the fuel injector
Edward Rosado
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My 2000 I30 Infiniti when I'm driving my RPMs go very high and the car starts driving slow I pull over for 5 minutes shut the car off restart the car and the car runs normal what could be the problem can someone help me out there it would be gladly appreciated
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insignia rev counter stops car loses power but doesnt stall turn off for a few minutes turn back on seems ok happened three times in last month.

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Why Does My Car Lose Power