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5 Reasons Why Your Car is Slow to Accelerate

When your car doesn't accelerate quickly, it can feel annoying—but it doesn't feel like an emergency. However, slow acceleration is often the first warning sign of a developing problem that can hurt your car's long-term performance and cause premature wear. Discover five reasons why your car is slow to accelerate.

car accelerating on highway

1. Faulty Oxygen Sensor

Your car's oxygen sensor monitors the air-fuel mixture in the engine. When it becomes dirty, it can no longer provide accurate readings, causing inefficient fuel combustion and resulting in a slow, sluggish start.

2. Faulty Throttle Body Position Sensor

A throttle position sensor (TPS) tracks the airflow into your intake manifold. If it malfunctions, your car can't properly control the amount of air, leading to an incorrect fuel-air mixture that can affect acceleration and overall performance.

3. Clogged Fuel Filter

A clogged fuel filter is bad news for several reasons. When it comes to your acceleration, a clogged filter stops fuel from getting through quickly because it has to battle through all the buildup. Your engine might simply not be getting the quick fuel delivery it needs for that fast start.

4. Clogged Fuel Injector

Your engine depends on the right fuel-air mixture for smooth acceleration. A clogged fuel injector acts like a blocked fuel filter, preventing enough fuel from reaching the engine. When the injector gets clogged, you'll notice a delay in acceleration due to insufficient fuel flow.

5. Faulty Mass Airflow Sensor

A faulty mass airflow sensor can throw off your car's air-fuel mixture by misreading the incoming air. This causes the engine to run inefficiently, leading to a noticeable loss of power, especially during acceleration.

Don't Put Off a Quick and Simple Fix for Slow Acceleration

Slow acceleration tells you that it's time to schedule an appointment with your mechanic. At Custom Complete Automotive, we can troubleshoot the problem, replace bad filters and sensors, and have your car performing at its best again in no time! Contact us today to schedule your appointment!


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About the Author
Eric Riddles

Eric Riddles is an ASE Certified Master Automobile Technician who has been working as an auto mechanic since 1998 and originally joined the team at Custom Complete Automotive in 2005. Eric has numerous certifications in various aspects of car repair and spent 10 years training the next generation of auto technicians at a local high school Auto Shop classroom.

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