Why Is My Car Losing Power While Driving? Top Causes and Solutions

If your vehicle suddenly feels sluggish, struggles to accelerate, or loses power while cruising, you're probably asking: why is my car losing power while driving? Loss of power is a serious safety concern and often signals deeper problems in your engine, fuel system, or transmission.

In this blog, we’ll cover the most common causes of power loss while driving and how Marble Falls Auto Center can diagnose and fix the issue quickly.

Clogged Fuel Filter or Failing Fuel Pump

Your engine needs a steady flow of clean fuel to maintain performance. A clogged fuel filter or failing fuel pump can restrict this flow and cause hesitation or sudden loss of power.

Symptoms include:

• Engine sputters or stalls under load

• Poor acceleration

• Trouble starting the vehicle

We test fuel pressure and inspect filters to ensure your engine is getting the fuel it needs at Marble Falls Auto Center.

Faulty Mass Airflow Sensor (MAF)

The MAF sensor helps regulate your engine’s air/fuel ratio. If it sends incorrect readings, your car may run lean or rich, both of which affect performance.

Watch for:

• Sudden power loss at high speeds

• Engine hesitation or jerking

• Check engine light with air/fuel codes

Our technicians can clean or replace your MAF sensor and recalibrate the system for optimal performance.

Why Is My Car Losing Power While Driving? Top Causes and Solutions

Failing Catalytic Converter

A clogged catalytic converter creates exhaust backpressure, choking the engine and reducing power — especially during acceleration.

Warning signs:

• Sluggish throttle response

• Rotten egg smell

• Overheating or misfire codes

We inspect your exhaust system for blockages and can replace faulty converters with EPA-compliant options.

Transmission or Clutch Problems

Power loss may not come from the engine at all — it might be your transmission slipping or your clutch wearing out. This results in the engine revving without the car accelerating.

Common signs:

• RPM increases but speed doesn’t

• Burning smell during acceleration

• Difficulty shifting or jerky movement

At Marble Falls Auto Center, we diagnose both automatic and manual transmission issues and offer reliable repair solutions.

Sensor or Ignition System Failure

Modern engines rely on sensors like the oxygen sensor, throttle position sensor, and crankshaft position sensor to run properly. If any fail, your ECU may cut power to protect the engine.

Symptoms include:

• Engine cuts out randomly

• Power drops under load

• Flashing check engine light

We’ll scan your vehicle, interpret the codes, and make fast, accurate repairs to restore safe driving power.

Final Thoughts

Still asking why is my car losing power while driving? Whether it’s your fuel system, sensors, or drivetrain, power loss isn’t something to brush off. It can affect your vehicle’s performance, safety, and long-term reliability.

At Marble Falls Auto Center, we specialize in engine performance diagnostics and can quickly pinpoint what’s robbing your vehicle of power — and fix it right the first time.