Decreased performance - what can this indicate?

When you get behind the wheel, you probably expect your car to perform flawlessly - after all, smooth driving depends on getting to work on time and having a successful vacation. No jerks, slow increase in engine speed and lack of acceleration are undesirable. However, if engine performance drops, one of the seven most common causes is usually at stake. They are here!

What will you learn from this post?

• • What can cause a drop in engine performance?
  • What to look for when the engine signals a malfunction

Shortly speaking

A decrease in engine power is most often manifested by jerks in the drive unit, an increase in idling, increased fuel consumption and difficult starting of the car. In a critical situation, the bike may go into emergency mode or completely stall. Common faults affecting driving performance include the fuel pump, injectors, coolant temperature sensor, throttle position sensor, air mass meter, or static time and fuel filter plugging monitor. Overheating the drive can be especially dangerous for your wallet - especially when the head breaks and needs to be replaced.

What could be the reasons for the drop in engine power?

Fuel pump wear

The fuel pump in the injection system supplies fuel from the tank to the engine. Along with significant wear stops working under high pressure, which directly leads to a decrease in the power of the drive unit. The reason may lie not only in its excessive wear, but also contamination with dirt and rust, or even regular refueling below ¼ of the tank volume.

Clogged injectors and fuel filter

The injectors are responsible for supplying fuel at the appropriate pressure to the combustion chamber. In order for them to function effectively, they must be free, so do not forget to replace the fuel filter in time - depending on the recommendations of the car manufacturer and the quality of this element of the system, the interval is from 15 to 50 thousand kilometers. Initially, as engine fouling increases, performance drops only slightly. Ultimately, a clogged filter can render you completely unable to continue driving, and you may decide to call for roadside assistance.

Coolant temperature sensor malfunction

This type of sensor transmits information about the coolant temperature to the controller, so that the fuel-air mixture can be formed in the right proportions. Before the engine finally warms up, the computer selects a large dose of fuel in relation to the air, and after it warms up, lowers it. Potential malfunctions often arise due to a short circuit in the detector., and among the symptoms that confirm this, we can note an increase in fuel consumption, difficulty in starting and an increase in idle speed.

Throttle Position Sensor Malfunction

The throttle position sensor senses changes in throttle deflection and transmits any such information to a computer that monitors engine operation. This allows the correct proportion of fuel to be selected to the amount of air passing through the engine. Among the reasons for the failure of the sensor stands out mechanical damage, poor contact on the plug connector and internal short circuits due to moisture this component or its contact with oil. If the detector does not work correctly, there are difficulties with starting, an increase in fuel consumption, as well as a lack of power and jerks of the drive unit after adding gas.

Air flow meter malfunction

The flow meter provides the computer with information on the intake air mass to calculate the correct amount of fuel to be injected into the engine according to the ideal fuel-air ratio. As a result, the engine runs smoothly, reduces the emission of harmful substances into the environment, and its combustion meets the standards specified by the manufacturer. Failures usually occur due to faulty electrical connectors or damage to measuring elements.... As a consequence, exhaust gas production increases with increasing fuel consumption, the engine warning lamp on the dashboard comes on and the engine starts in emergency mode or goes out completely.

Malfunction of the device for monitoring the static lead angle

The ignition timing is the deflection of the crankshaft between the moment the spark appears on the spark plug and the engine piston reaches top dead center. That's what it's called the point at which the piston approaches the cylinder head and as far away from the crankshaft as possible... If the device controlling this configuration is displaced (due to the fact that it receives erroneous signals from the camshaft position or from knock sensors), it begins to block the engine at full power.

Overheating of the drive

If the temperature of the drive unit is too high and its power drops, it is also worth taking a closer look at its condition. cooling system for damage to hose, fan or pump... Any defects in them can lead to deformation of the main components of the engine (including cracks in the head) and additional costly repairs.

As you can see, degrading engine performance should not be ignored because it is easy to aggravate problems, which can lead to exponential increase in repair costs. As soon as you notice that the drive power drops, take the car to a service center - then you will prevent further failures. And when it comes to replacing the main components of the drive, check their prices on the avtotachki.com website - here quality goes hand in hand with attractive prices!

Also check:

Should you flush the engine?

Check engine or engine light. What if it catches fire?

Typical malfunctions of gasoline engines. What most often fails in "gasoline cars"?

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