Car Losing Power? Here's Why and What to Do

Sunday, 6 July 2025 16:43

Discover the common reasons behind your car's power loss, including worn piston rings, valve problems, and a leaking head gasket. Learn how to address these issues and restore your car's performance.

illustration engine compression © copyright Artem Podrez - Pexels

Experiencing a sudden dip in your car's power, even after regular maintenance? This is a common issue, especially in vehicles older than five years or those frequently used. One of the primary culprits is a decrease in engine compression.

Understanding Engine Compression

Engine compression refers to the volume change in the engine cylinder when the piston moves from the top to the bottom of its stroke. This ratio, which varies depending on the engine, is crucial for optimal engine performance. When compression drops, your car loses power and efficiency.

Common Reasons for Decreased Engine Compression

Several factors can contribute to a decrease in engine compression, including:

  • Worn Piston Rings: Over time, piston rings can wear down or get stuck, leading to compression loss. This is more prevalent in older cars.
  • Valve Problems: Stuck or poorly sealing valves can cause compression leaks, impacting power. This could be due to dirt, carbon buildup, or worn valve seals.
  • Leaking Head Gasket: A damaged head gasket creates a pathway for compression to escape, affecting engine performance.
  • Damaged Cylinder Head: A cracked or warped cylinder head leads to compression leaks, potentially caused by overheating or other issues.
  • Cylinder Bore Wear: As your engine ages, the cylinder walls wear down, creating gaps that allow compression to escape.

Taking Action When Your Car Loses Power

If you notice a significant drop in your car's performance, it's crucial to seek professional help. A mechanic can diagnose the specific problem and recommend the appropriate solution to restore your car's power and efficiency. Ignoring this issue can lead to further engine damage and costly repairs.

Related Articles

Worn Piston Rings: Recognizing the Signs and Preventing Future Damage
Ignoring Your Car's Overheating Warning Light Could Cost You: What To Know
Why Using a Torque Wrench is Essential for Installing Car Wheels
Oil Filter Effectiveness: Protecting Your Engine
Hidden Tire Dangers: What to Watch Out For and How to Prevent Them
Steering Wheel Noises While Turning: What They Mean and How to Fix Them
Unusual Car Noises? Don't Ignore Them, Get Your Car Checked!
Extend Your Car's Life: Understanding Battery Lifespan
Maximize Windshield Wiper Longevity: Simple Tips for Safe Driving
CVT vs Manual: Which Transmission Lasts Longer?
Keep Your Automatic Transmission Car Running Smoothly: Essential Fluid Change Guide
Driving on a Flat Tire: 5 Serious Dangers You Can't Ignore