Car Jerks During Acceleration

10 Reasons Why Your Car Jerks When Accelerating

In Driving by 4 Comments

If your car jerks when accelerating – you are absolutely not the only one.

This is a widespread problem when it comes to cars because many different failed engine components can cause this problem.

A car engine needs the right air-fuel ratio to run efficiently. If there is an imbalance in this ratio, the car engine skips one of its combustion cycle processes and ends up misfiring.

Here are 10 common reasons why your car jerks when accelerating.

1. Dirty Air Filter

Dirty Air Filter

The air filter makes sure that the engine always gets fresh air without getting any dust or other dirt through the engine, which can damage it seriously.

The air filter should be replaced regularly, and if it hasn’t been done in a while, it can get filthy, especially if you live in a very dusty place. Checking the air filter is easy to do – so check it and replace it if it is terrible.

2. Dirty or Damaged Mass Air Flow Sensor

Dirt Maf Sensor

The mass airflow sensor measures the air entering the engine. This sensor can collect a lot of dirt through the years, making it read a false amount of air into the engine.

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This can cause a faulty air-fuel mixture, which can cause your engine to start jerking on acceleration. Remove the mass airflow sensor and clean it carefully with an electrical cleaner. Replace it if you suspect that it is faulty and have done proper research.

3. Clogged Fuel Filter

Dirty Fuel Filter

A clogged fuel filter is absolutely not a rare problem. Dirt and dust come into the fuel tank every time you refill your car, and it can even come with the fuel.

If the fuel filter gets clogged, the engine won’t get enough fuel to function properly, and you may experience jerking and hiccups when trying to accelerate.

Replacing the fuel filter is often pretty cheap and easy to do, so if you haven’t done it in a while, you should replace it.

4. Faulty Fuel Pump

Cars Fuel Pump

A faulty fuel pump can cause similar problems as a clogged fuel filter, which leads to lean-mixture for the engine. The fuel pump is often located inside the tank and pretty difficult to replace.

This means that you should be pretty sure that the fuel pump is faulty before replacing it. One way to check it can be to install a fuel pressure gauge on the fuel rail to measure the fuel pressure.

If you have replaced the fuel filter and the fuel pressure is low on acceleration – you have a bad fuel pump or fuel pressure regulator.

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5. Faulty Fuel Injector

Fuel Injectors E1609793590952

The fuel injectors control the amount of fuel entering each cylinder. You have one fuel injector on each cylinder.

If one of the fuel injectors goes bad, you will experience misfires, resulting in jerking while you are trying to accelerate your car.

This is not a very common problem though, you be sure that they are broken before replacing them.

6. Bad Spark Plugs

Spark Plug

The spark plugs control the ignition in the combustion chamber, and without them, your car won’t run at all.

Spark plugs get worn over time, and a faulty spark plug can result in misfires, which can cause jerking on acceleration. They are pretty easy and cheap to replace, so if you haven’t done it in a while, you should absolutely do it.

7. Faulty EGR Valve

Egr Valve

The EGR valve controls the exhaust gases, which should be recirculated into the car engine. If it releases too much or too little exhaust gases into the intake – your air-fuel mixture might get wrong, which will cause misfires.

On some cars, it is possible to plug the EGR valve pipes. If possible – try to remove the EGR connector and plug the pipe to see if the problem is getting better.

8. Bad Ignition Coil/s

Three Ignition Coils Vag

The ignition coil gives spark to the spark plugs, and as you might understand, a bad ignition coil can cause serious misfires.

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Some cars have separate ignition coils, and some have one for all cylinders. If you have separate ignition coils, it can be one or two faulty ones. Check the trouble codes for any specific cylinder the misfires occur on – and replace the ignition coil on the given cylinder to see if that is the problem.

9. Blocked or Clogged Catalytic Converter

Clogged Catalytic Converter

The catalytic converter is helping your car going through the emission tests and giving us a better environment. Unfortunately, the internal parts of the catalytic converter can sometimes become loose.

This can cause the exhaust pipe to become blocked and create too much back pressure in the exhaust system – which will make your car jerk on acceleration.

Try to remove the catalytic converter and inspect it to see if it is clogged or if you can see any loose parts.

10. Transmission problems

Car Shifting Problems E1609782519191

When your car jerks when accelerating, it doesn’t have to be a problem with the engine, actually. In some rear cases, it can be a problem with the transmission or gearbox.

It can be a slipping clutch or something else damaged in the transmission. Transmissions are complex things, so if you think it is a problem with it – you do best to let a professional mechanic handle it instead.

4 thoughts on “ 10 Reasons Why Your Car Jerks When Accelerating ”

  1. Does a leaky manifold have anything do with your o2sensors?

  2. Car has a sweet smell, car started jumping as I Accelerated, the temp gauge keep moving to hot, but it did not running hot. Please help I go to Nissian, I’m afraid I’m pay out a lot, if I don’t know what the cause is.

  3. Hi, i have a 2001 VX holden commodore wagon.
    Today, my car started with no issues, however, when i went to acceletate after car was parked on side of road, it jerked and shuddered and had major loss of power. More to the point, it had absolutely no power.
    It did it for a couple of minutes before coming good and had no issues thereafter. I wasn’t going uphill.
    In last 6 months i’ve had fuel pump, water pump, tensioner, oxygen sensors, starter motor and alternator replaced.
    I’ve also had injectors and couple of other thing cleaned my mechanic.
    About 12 months ago, fuel filter was replaced.
    Car has done a bit over 280 000kms without any major issues. General service is done every 6 – 12 months (which is nearly due).
    Thank u

  4. My problem…
    My car is, Honda civic 2010 4 cylndr auto. Yesterday I added some motor oil as i found level was low. But accidently I added more. Today morning after 10 miles driving, car start jerking ,at low speed or pressing gas padel, or after stop on stop sign .What should I do as I am away from any mechanic now??.. Kindly help me.

  5. If you need answers to your car questions, it is much more likely that you will get answers in our car community. You can find our community here.

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