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Summary
  • There are many explanations as to why you might feel vibrations in your gas pedal when you accelerate, each revolving around malfunctioning parts.
  • Faulty spark plugs, malfunctioning CV joints, seized brake calipers, imbalanced tires, and worn-out bearings can cause the gas pedal to vibrate when you step on it.
  • The best way to prevent your gas pedal from vibrating when you accelerate is to avoid driving at full throttle, clean and maintain your vehicle regularly, and have professionals inspect it often.

As far as vehicular problems go, dealing with a gas pedal that vibrates when you accelerate isn’t so bad. You can still definitely drive your vehicle from point A to point B if the gas pedal vibrates.

Still, that doesn’t mean you can disregard the issue. Feeling excessive vibrations when you step on your gas pedal could point to an issue that’s expensive to repair when left unresolved.

Issues That Can Cause a Vibration in the Gas Pedal During Acceleration

It’s never a good sign when a vehicle’s parts start doing things they shouldn’t. While a vibrating gas pedal might not be as serious a problem as, say, an overheating engine, it’s still an indicator there’s something wrong with your daily driver.

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car pedals pressed
Feeling excessive vibrations when you step on your gas pedal could point to an issue that’s expensive to repair when left unresolved.

Here are some of the possible explanations as to why your gas pedal vibrates when you accelerate.

Faulty Spark Plugs

Spark plugs that are not well-maintained can accumulate dirt and prematurely wear out. Besides causing the gas pedal to vibrate when you step on it, worn-out spark plugs can cause a wide variety of problems, such as rough idling and engine misfires.

Malfunctioning CV Joints

When CV joints crack or corrode, all sorts of gunk can build up and cause the joints to lock in place, leading to unpleasant vibrations in the gas pedal.

Seized Brake Calipers

The brake caliper is the part that squeezes the rotor to create friction that stops the car when braking. If a caliper is stuck, it will constantly “brake” its wheel, which can cause excessive vibrations when you step on the gas pedal.

Seized calipers can also lead to other complications, such as uneven braking, poor braking performance, and an overheating braking system. It could also cause a foul burning smell and brake fluid leaks.

This problem typically occurs when the brake caliper slides due to dirt buildup or corrosion. Calipers can also seize when the bolts are too tight or inadequately lubricated.

Tire Imbalance

If your tires are unbalanced, you might feel vibrations not just in the pedal, but also in your steering wheel and seat.

You might have to deal with other problems too, such as poor handling and stability, uneven tire wear, and loud noises when driving. In more severe cases, your vehicle might even veer to one side when its tires are imbalanced.

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Tires can go out of balance due to various factors and conditions, such as uneven weight distribution, improper tire installation, inconsistent tire wear, and bad driving habits. The simplest solution would be to replace your vehicle’s tires completely or in pairs to make sure all of them wear evenly.

Worn-Out Input Shaft Bearing

If the input shaft is worn out, you might also hear humming noises from the pedal besides feeling excessive vibrations.

One way to confirm if the input shaft bearing is responsible is to shift your vehicle to neutral while driving. If the vibration stops, then the shaft bearing is indeed the culprit and it’s time to get it repaired or replaced.

How to Prevent Your Vehicle’s Gas Pedal From Vibrating

While knowing why your gas pedal is vibrating can help you resolve the issue, it’s better to prevent the problem altogether. Here are some handy tips to help you prevent your vehicle’s gas pedal from vibrating when accelerating.

Limit Driving at Full Throttle

Driving your vehicle at full speed often wears out its components faster. This makes it more likely for different components to malfunction, including the gas pedal.

Clean Your Vehicle Regularly to Prevent Dirt Buildup

When dirt accumulates and grime clogs the joints and axles of your vehicle, different components can lock up or malfunction. This also has the potential to make some parts vibrate when you accelerate, so make cleaning your daily driver part of its regular maintenance routine.

Have Your Vehicle Serviced More Frequently

Sometimes cleaning your vehicle yourself isn’t enough to prevent your vehicle’s gas pedal from vibrating when accelerating. To cover all your bases, bring your ride to a professional often for proper servicing and maintenance.

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Having a trained mechanic inspect your vehicle can help you address issues immediately and nip potential problems in the bud.

Frequently Asked Questions About Gas Pedal Issues

Why do I feel a vibration in my gas pedal at low speeds?

More often than not, there might be something wrong with your vehicle’s engine mounts if you feel vibrations in your gas pedal when driving at lower speeds. You might also feel your car shaking and hear it rattling if the engine mounts aren’t properly installed.

It’s important to address this problem as soon as possible because driving with faulty engine mounts can put a lot of strain on the engine, potentially damaging it.

Why does my gas pedal vibrate when idling?

If your gas pedal vibrates due to rough idling, your crankshaft or your transmission might be damaged. It’s strongly recommended to get your vehicle serviced by a professional to confirm and resolve this issue.

What does it mean if I feel a slight vibration in the gas pedal when accelerating at 50 mph?

For drivers who consistently feel a vibration from the gas pedal when driving at speeds between 50-60 mph, there’s a good chance that there’s something wrong with your vehicle’s wheels and tires.

Odds are the wheels are misaligned or the tires are worn. It’s recommended to inspect your vehicle’s tires to see if they’re due for a replacement.

About The Author
Written By Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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