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Yearly Archives: 2017

Failing EGR Valve

Failing EGR Valve

What is an EGR valve? The EGR valve is a small component, invented to allow the flow of exhaust gases into the intake manifold in controlled amounts. It is a simple valve that closes and opens as needed. The EGR valve has one job to do. Its role is to either open and direct exhaust gases into the combustion chamber or to close and keep the gases from entering. When your car engine starts, the valve becomes active and remains in a closed position, barring the flow of exhaust gases. Once the engine reaches working temperature and speed is increased, the valve — either through a vacuum or electronic control — increasingly opens, allowing burned exhaust gases to enter and combine with the air-fuel mixture inside the combustion chamber. If you slow down or come to a stop, the valve progressively closes and blocks the flow of exhaust gas. The process continues for as long as the engine is running. When the engine is off, the EGR valve closes and remains so. The EGR valve has ... read more

Categories:

Mercedes-Benz

Fuel Pump Replacement

Fuel Pump Replacement

  Fuel pump replacement is a necessary part of your car's maintenance.  A fuel pump transfers fuel from your tank to your engine. It supplies the fuel at a constant pressure to ensure that the engine is running smoothly. Mechanical or electronic fuel pumps are standard in your vehicle.   A mechanical pump has a diaphragm mounted on the outside of the fuel tank that expands and contracts, creating a vacuum system that expels fuel out of the gas tank and into the engine. Electronic pumps use an electromagnetic motor inside the fuel tank that forces fuel into the engine at a high pressure. Cars with carburetors contain mechanical pumps while vehicles with fuel injection systems have electric pumps.   The motion of the engine directly drives a mechanical pump. Since mechanical pumps contain few moving parts, they tend to be reliable and easy to diagnose and fix. The most common problems with mechanical pumps occur when the diaphragm is damaged in some way, whic ... read more

Categories:

car maintenance

Walnut Blasting

Walnut Blasting

                                    Walnut blasting is now being offered at DJ Foreign Auto Care! What is walnut blasting you may ask? Walnut blasting is a process that is used to treat heavy carbon build-up. Cars require oxygen to run. With modern direct injection engines, when your foot is placed on the accelerator, the car releases gasoline into the combustion chamber of the vehicle. The spark plugs then ignite the gasoline in the combustion chamber, causing the car to run. Carbon is released into the engine as a byproduct of this process.  The carbon interferes with the vehicle’s normal combustion, which in turn alters the compression ratio, operating temperature, and sensor readings.  The carbon builds up and coats the inside of your engine including the air intake valves, combustion chamber, and exhaust, restricting your car’s ability to breathe and al ... read more

Categories:

car maintenance

Cabin Air Filter

Cabin Air Filter

Cabin air filter replacement on a regular basis is important for keeping the air clean inside your car. The cabin air filter in your car functions like your home's furnace filter, filtering the air you breathe inside the car. If your car's cabin filter is is completely dirty and clogged, you and your passengers could be breathing in particles such as pollen, dust, mold spores, dead leaves, tobacco smoke, soot, smog, pet dander and fungus!  If you are wondering where the cabin air filter is located in your vehicle, check out http://filterlocation.com/ At DJ Foreign Auto Care we generally recommend replacing your cabin air filter at around 15,000 mile intervals.  If you have allergies, or pets in the car with you, you may want to change your cabin air filter more often to keep your air clean inside the car.  We also visually inspect the cabin air filt ... read more

Categories:

car maintenance

Engine Oil Flush Benefits

Engine Oil Flush Benefits

  "Engine oil flush" or "Performance Oil Change" describes a process where a service technician adds chemicals to the oil so that built-up carbon deposits are cleaned out of narrow oil passages, valves and combustion chambers.  The dirty oil and chemicals are then flushed out of the system and replaced with clean oil.  Performing an engine oil flush is especially beneficial when large amounts of sludge and deposits build up in the oil system, which can clog oil passages and potentially lead to serious engine problems, when the many moving parts in the engine get gummed up.  An engine oil flush can restore fuel efficiency and power to your engine, as well as save on wear and tear by keeping all the parts in your engine moving as they should.  A performance oil change / engine oil flush service may be a good idea when there have been long intervals between oil changes, when you purchase an older vehicle and you ... read more