Why Is My Car Losing Power?

Vehicle dashboard

There are several possible reasons which may account for loss of performance in your car – if when driving you feel that car is losing power, it is more than likely that it is one of the following; either there is not enough fuel in the vehicle or there is a problem with another component of the engine/vehicle causing strain. This could be a relatively minor reason or an indication of something more serious.

A Blocked Fuel Filter

The fuel filter is in place to screen any contaminants such as dirt, rust and other debris and ensure they stay out of the engine and do not cause any damage. With time, however, the filters need to be replaced as they become clogged with dirt. A clogged filter will cause the fuel pump to work much harder and result in a subsequent reduction in power.

Air Conditioning

On a hot day with the aircon cranked up on a long journey, the car may not appear to pull as well as it usually does. This is because the air conditioning is using up a portion of the car’s engine power. A fault with the air conditioning can mean that the engine has to work even harder, making it important to keep the system well maintained.

The Fuel Injector

Any type of issue with the fuel injector can mean that the car may lose power- over time deposits can accumulate on the injectors, one of the most common reasons for this is carbon build-up, due to low-grade fuel. This build-up of carbon can make it difficult for the injectors to spray fuel into the cylinders and this ultimately causes a loss in performance, making it important to ensure they are inspected at regular intervals and cleaned if necessary.

Clogged Air Filter

A reduction in horsepower due to oxygen deprivation is another potential cause of sluggish acceleration. This may be the result of a clogged air filter that has become blocked with dirt and debris over the miles. Clean air is essential for the engine to function properly, and a blocked air filter can mean that the engine has to work harder to pull in the air. If the car responds slower than it usually does, this may be a sign that it is not getting the clean air it needs – as less air means less power.

Blocked Exhaust

The exhaust system has a number of functions; these are to remove harmful gases from the engine and direct these fumes away from the car and its passengers, to improve the performance of the engine and fuel consumption, and to control noise. If there is an obstruction in the exhaust this can affect the performance of the engine. Good quality additives to the fuel system can help to eliminate this problem.

Weak Fuel Pump

The fuel pump has to be functioning effectively to be able to deliver fuel from the tank to the engine at high pressure. If the fuel pump malfunctions, this will cause acceleration problems with the vehicles. The fuel pump however is replaceable.

Turbo Failure

Slow acceleration can also be an indication of an issue with the turbo. Common issues which can cause turbo failure include general wear and tear – although the average turbo has a long life expectancy, high mileage and driving style can also cause problems. Any leaks or cracks between the engine and the compressor can mean that the turbo has to work harder. Ensuring that the oil is regularly changed and in good condition is also important.

Our Services

Longmynd Service Station is an independent garage offering a wide range of services including diagnostics and offers a collection and delivery service.  We are an accredited Bosch Car Service Centre due to our outstanding levels of customer service and workmanship.

Our services include:

  • MOT Station - Class 1, 2, 4, 7,
  • All makes servicing
  • Brake, suspension and general repairs
  • Clutch and timing belt changes
  • Tyres, exhausts and batteries
  • Air conditioning service and repair
  • Electronic diagnostics
  • Four-wheel alignment
  • Accident repair, bodywork and paint refinishing

For more information on our services, get in touch today.