Toyota Corollas are some of the most dependable compact cars on the market. However, like all other automobiles, they can experience issues every now and then. If your Corolla isn’t accelerating properly, it could put you in numerous dangerous scenarios. Thankfully, most of the repairs are relatively straightforward.
A Toyota Corolla acceleration problem that won’t let it move or makes it accelerate sluggishly is caused by low transmission fluid, a broken drive shaft, a damaged axle, or a bad transmission. If it hesitates, it’s often caused by a clogged fuel component that won’t transfer the gas quick enough.
Throughout this article, we’ll explain why your Toyota Corolla might be accelerating too slow or not at all. We’ll also cover what could make it suddenly accelerate without any warning signs.
Toyota Corolla No Acceleration
A Toyota Corolla without any acceleration often points to a transmission problem. Unfortunately, transmission repairs aren’t cheap. The good news is you might only have to change the fluid. Transmission fluid gets dirty and grimy after a while. If it’s not pinkish or it looks dark brown, it’s time to swap it out.
Another cause could be a damaged transmission. Your car should be able to shift into the driving mode, but it won’t catch and turn the wheels if the transmission is broken. This problem leads to a lack of acceleration, even if you hear the pedal screaming while trying to burn gasoline.
Another issue could be the drive train. If it’s not connected to the wheels, it’ll turn all day without moving the vehicle. A car crash or mishandling could slowly wear the drive train until it breaks or cracks into a couple of pieces, making it useless. If the car is revving loudly but the wheels aren’t turning, it’s best to stop and call a mechanic.
Here are a few other reasons your Corolla won’t accelerate:
- A bad torque converter can prevent the transmission from receiving enough power, preventing it from turning the wheels and propelling the vehicle.
- If your manual Corolla’s clutch is broken, you won’t be able to accelerate.
- The timing belt or chain can break, preventing it from supplying fuel to the vehicle and making it rev without moving.
Toyota Corolla Slow and Sluggish Acceleration
If your car’s accelerator works but it’s much slower than usual, there could be a host of issues. For example, a faulty fuel pump pulls gas from the tank without supplying enough of it to the vehicle. Your Corolla will burn an improper oxygen-to-fuel ratio, making it louder and much less effective. Over time, this process can permanently damage the vehicle.
Much like the previous example, a dirty fuel filter causes the same issue. If it’s clogged or clouded with dust, debris, and grime, the fuel filter won’t supply enough oxygen. Your car will burn an incorrect ratio and could overheat. Furthermore, it’ll randomly skip or jump while accelerating since the fuel supply is random and unpredictable.
Line leaks cause sluggish acceleration, especially if it’s the vacuum line or fuel line. The vacuum line supplies oxygen, while the fuel line adds gasoline. As we covered above, a lack of one or the other throws everything off. You can see how the fuel mixing process is crucial to your vehicle’s acceleration.
The bad news is that most of these repairs are a bit pricey compared to fluid changes or sensors. However, they’re more than worth it since your Corolla can become dangerous to drive if you don’t fix them.
Is your Corolla skipping or hesitating when you’re pushing the pedal? Read on for explanations and solutions.
Toyota Corolla Acceleration Hesitation
Hesitated acceleration in any vehicle is often due to the same issues as mentioned above. A clogged fuel pump or filter will alter the fuel intake ratio, making it less effective and more likely to be sluggish or skippy. When it jolts forward, your Corolla gets a bunch of fuel; When it slows down, it’s not getting enough.
This hesitation is often ignored because drivers chalk it up to the vehicle’s age. Old cars have acceleration issues, but that doesn’t mean they should be ignored. If your Toyota Corolla is skipping or hesitating when you press the gas pedal, something needs to be cleaned (filters), swapped (hoses and fluids), or changed (transmission, intake valves, etc.).
Sadly, the hesitation will worsen if you don’t deal with the problem. It’s the worst when you live in a coastal town since there’s typically lots of humidity and salinity. These factors corrode your vehicle’s transmission, causing it to break sooner.
Try these four solutions:
- Replace the fuel filter to improve the gas intake.
- Inspect and replace the vacuum line and fuel line, if necessary.
- Check if the drivetrain is connected to the axle.
- Look at the transmission fluid and change it if it’s not pink or clear and red.
This simple process is often enough to fix the problem. If none of them stopped your Corolla from hesitating when you accelerate, it’s time to see a mechanic. Don’t forget to check your vehicle’s warranty information, too. Toyota usually offers an extended drivetrain warranty.
Toyota Corolla Misfire on Acceleration
There are three things needed to make your Corolla accelerate properly:
- A spark
If any of those factors are thrown off, something’s going to misfire. Your Corolla’s misfire could feel like a jerking motion when you’re accelerating. It’s not always the fuel’s fault if something misfires, though.
A bad battery or alternator could cause a misfire reaction. When there’s not enough power to combust the oxygen and fuel, it’ll have less acceleration than it normally would. Use a multimeter to test your car’s battery or check the battery meter on the dashboard.
The same issues that cause misfiring and sluggish acceleration can also cause loud noises under the hood and dark smoke coming from the exhaust pipe. If you notice either of these concerns paired with misfiring, the combusted fuel is dirty.
Toyota does an excellent job of creating a clean environment for their brand-new cars, but you should follow the provided user’s manual to know when you need to change the filters and hoses. If you follow these recommendations, the misfiring and jerking motions will stop when you’re accelerating.
Toyota Corolla Sudden Acceleration
Toyota was sued for over $1.2 billion for unpredictable acceleration in some of their engines. If your vehicle was recalled for this issue, sending it back is crucial since there’s no replacement for safety.
If your Corolla is accelerating on and off when you press the pedal, it’s best to follow the same guidelines as the misfiring section. When the fuel goes through and randomly combusts with the correct ratio, it’ll accelerate as it’s supposed to. This process might seem like something’s wrong, but it’s just the engine working through a dirty filter. Change it and you’ll be good to go.
If the car starts accelerating on its own, gently apply the brakes, turn on your hazard lights, and pull to the side of the road. Thankfully, this rare issue only occurred in the 2009 models, so it’s unlikely that any other year would have it.
Note: Some drivers make the mistake of thinking a clogged filter or hose can cure itself. Just because your Corolla is accelerating normally for a little while doesn’t mean the lines or filters are clean. The issue could be related to a damaged battery that’s on its last leg. If it happens once, it’ll happen again until you find the solution.
KnowMyAuto is the sole owner of this article was published on Aug 20, 2021 and last updated on .