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Why Your Car Doesn't Accelerate Properly

The gage of the car with many of number on display screen
When you put your foot on the gas, your car should accelerate reliably. If this doesn't happen, your car will be dangerous to operate. As you are driving up a hill or a ramp, your car may slow down and become a hazard. You will need to get to the bottom of why your car won't accelerate properly.

Clogged Fuel Injectors

The fuel system of your car controls the rate at it accelerates. Sometimes, the fuel injector might become clogged as a result of contaminants in the fuel. These injectors influence how much fuel is delivered to the internal combustion engine and will fail to deliver adequate fuel if their tiny passages become clogged. You may experience additional symptoms such as:
  • Rough idling
  • Your car struggling to start
  • Reduced fuel efficiency
While clogged fuel injectors are one of the most common causes, there are several other issues to investigate. 

Leaking Fuel Lines

You may have a leak in your fuel line, which will reduce how much fuel is able to reach the engine. Not only will this reduce the performance of your engine, but it may also lead to a dangerous situation where gasoline could pool near your car and could ignite. You may also find yourself unable to start your car because all of your gasoline leaked out.

Defective Catalytic Converters

A clogged or failing catalytic converter will cause your car to accelerate more slowly. You may also notice your engine running hotter than usual. Your catalytic converter can be expensive to repair, but you must replace it.
The cost of the catalytic converter is based on the vehicle you are repairing. For instance, the repair cost of a Mini is much higher than a BMW.

Leaking Vacuum Systems

Your car may have a leak in the vacuum system, and this will cause your computer to struggle to regulate the fuel to air ratio. In these cases, the car will be much slower to accelerate, and you will feel that your car doesn't have enough power. This will likely turn on the check engine light.

Dirty Airflow Sensors

You may have a dirty airflow sensor that will cause your sensor to send wrong information to the computer. The dirty sensor will likely cause your check engine light to turn on. An airflow sensor replacement can cost a few hundred dollars. 

Defective Fuel Pumps

You may have a defective fuel pump. When the fuel pump is not functioning properly, it will not deliver an appropriate amount of fuel to your engine. Your car will accelerate slowly and may even stall at a higher speed. The fuel pump replacement can be one of the more expensive repairs and can cost as much as $1,000.

Clogged Fuel Filters

The fuel filter can become clogged. The clogged filter will reduce how much fuel can reach the injectors and will cause your car to accelerate more slowly. Fortunately, you can clean a clogged fuel filter yourself. With hose clamps and a flathead screwdriver, you can shut off the fuel line.
Before removing the filter, place a pan underneath to catch the dripping fuel. Make sure to wear safety glasses because the fuel line will be under pressure and might spray fuel everywhere. Remove the fuel filter and apply carburetor cleaner to the filter. Then, shake the filter to knock debris loose. Allow the filter to dry and put it back in place.
At the very least, you should bring your car into a professional auto repair store such as Corporate Auto Works. We specialize in the repair of Volvos, BMWs, Audi, Minis and several other brands.