Leading Causes Behind Excessive Exhaust Smoke in European Cars

At times, certain issues in your European cars can become pretty concerning, and one such problem is related to emission of excess smoke from the exhaust. European cars are known for their advanced emission control equipment, and the emergence of excess smoke might be caused by underlying problems.

There are certain factors that can lead to emergence of excessive smoke from the exhaust system of European cars, and being a European car owner, it is impertinent for you to know about these issues. In this article, we will discuss the leading causes behind excessive exhaust smoke in European cars.

Factors Behind Excessive Exhaust Smoke

Damaged Valve Stem Seals

The valve steam seals in your European car is responsible for preventing the engine oil from entering the combustion chamber in your vehicle. Now, the valve stem seals are made up of rubber seals, and over the years, these rubber seals harden up, and become brittle due to continuous exposure to high engine temperatures.

Whenever, the rubber seals completely lose their flexibility, the oil gets past the valves and burns during combustion. This is when drivers come across emission of blue smoke from the exhaust of their vehicle after starting their car. In fact, the smoke becomes evident when you idle for several minutes before accelerating.

Moreover, as the problem goes unaddressed for sometime, the oil consumption in your high-end car is going to increase and you will notice that your vehicle requires frequent top-offs between oil changes. In addition to that, the spark plugs in your vehicle might become oil-fouled, and lead to rough idling, reduced fuel efficiency, and engine misfires.

This is when you get to see excess smoke coming out of the exhaust of your vehicle, and if the problem isn’t addressed quickly, then it can damage the oxygen sensors and catalytic converter in your car.

Failing Piston Rings

The piston rings in your high-end European cars are one of the most important components as they help create a tight seal between the pistons and cylinder walls. One of the top most priority of the piston rings is to maintain tight compression, help control oil consumption, and transfer the heat away from the pistons.

Over the years, as your vehicle gains miles, the piston rings start wearing out, and this is when the engine oil slips into the combustion chamber, and gets burned along with the air-fuel mixture. This is when you are going to come across blue colored exhaust smoke, especially during acceleration, and under heavy engine loads.

Moreover, while driving, drivers are going to experience a drop in the power output from the engine, inadequate compression, starting issues, increase in crankcase pressure, and drastic increase in oil consumption. Furthermore, European cars with extended oil change intervals or inconsistent maintenance schedules are prone to piston ring wear due to carbon buildup and lubrication breakdown.

Blocked or Faulty Air Intake System

The European cars come equipped with highly advanced engines that require proper balance of air and fuel for combustion process to take place. Now, if the flow of air to the engine gets restricted due to blocked air filter, collapsed hoses, dirty mass airflow sensor, or clogged intake tract, then the engine runs excessively rich.

This is when drivers might get to see black colored smoke coming out of the exhaust of their vehicle as some of the injected fuels don’t get burned off completely. During this time, you might also be faced with sluggish acceleration, bad throttle response, drop in fuel economy, and illuminated check engine lights.

The high-end sensors in your car might get damaged due to oil vapors, dust, or aftermarket air filter oils. The intake system need to be inspected on routine basis to help maintain adequate combustion and reduce emissions.

Bad Fuel Injectors

The fuel injectors in European cars are meant to optimize combustion and minimize emissions for the smooth running and better performance of the car. Most of the time, it is observed that when fuel injectors become clogged, leak, or remain partially open, then excess fuel is delivered to the combustion chamber.

Due to this you are going to experience rough idle, engine hesitation during acceleration, reduced fuel economy, and increase in emissions from your vehicle. In fact, your high-end car needs to be inspected by a certified technician to help address the problems.

Finally

The above-discussed factors are some of the leading reasons behind excess exhaust smoke coming out of European cars. In fact, the moment you get to see an increase in smoke levels from your vehicle, or colored smoke coming out of the exhaust, you must get your vehicle inspected by professional mechanics immediately.