Monthly Archives: June 2015

Computerized Engine Analysis

Computerized Engine Analysis

Your modern vehicle’s engine is a highly sophisticated piece of equipment. The days of your father’s gas-guzzler are long gone—instead, Federal Exhaust Emission and Fuel Economy regulations demand that today’s vehicles be equipped with electronic engine control systems, to curb carbon emissions and increase fuel efficiency. With technically-advanced control systems taking the place of simple engine components, common maintenance services such as tune-ups are also a thing of the past. Regular services (such as spark plug and filter replacements) are still required, as well as a computerized analysis of your vehicle’s control computer. Our factory-trained technicians are here to provide these basic services.

Here’s how your modern vehicle’s control computer operates:

A network of sensors and switches convert and monitor engine operating conditions into electrical signals. The computer receives this information, and, based on information and instructions coded within this savvy computer program, commands are sent to three different systems: ignition, fuel, and emission control. Whenever a problem arises (as seen by that nagging “check engine” light), our service pros check whatever command is prompted, in addition to the status of your engine control computer and sensors. That way you’ll know if your vehicle’s performance is caused by a real problem, or just a sensor/computer issue.

Here’s a brief overview of your vehicle’s sensory components:

• Mass airflow sensor
• Throttle position sensor
• Manifold absolute pressure sensor
• Coolant temperature sensor
• Exhaust oxygen sensor
• Crankshaft position sensor
• Camshaft position sensor

Brake service & Systems

Braking Systems

The brake system is actually composed of two kinds of systems—Hydraulics and Friction Materials. Here’s what happens within these systems between the time your foot hits the brake pedal and your car stops.

Hydraulics

Master Cylinder

When pressure is applied to the brake pedal, the master cylinder creates hydraulic pressure which pushes brake fluid to the wheel brakes.

Brake Lines and Hoses

Steel brake lines and high pressure rubber hoses are the avenues through which the pressurized brake fluid travels.

Wheel Cylinders and Calipers

These are the hydraulic cylinders that apply pressure to the friction materials, causing your car to stop.

Friction Materials

Disc Brake Pads and Drum Brake Shoes

These brake linings are composed of high temperature materials that create the friction that stops your car.

Types of Brakes

Disc Brakes

Disc brakes consist of a Disc Brake Rotor, which is attached to the wheel, and a Caliper, which holds the Disc Brake Pads. Hydraulic pressure from the Master Cylinder causes the Caliper Piston to clamp the Disc Brake Rotor between the Disc Brake Pads. This creates friction between the pads and rotor, causing your car to slow down or stop.

Drum Brakes

Drum brakes consist of a Brake Drum attached to the wheel, a Wheel Cylinder, Brake Shoes and Brake Return Springs. Hydraulic pressure from the Master Cylinder causes the Wheel Cylinder to press the Brake Shoes against the Brake Drum. This creates friction between the shoes and drum to slow or stop your car.

Parking Brake

The Parking Brake uses Cables to mechanically apply the brakes (usually the rear brake.) This is used to prevent the car from rolling when not being driven.

Anti-Lock Brakes: A System Built For Safety

Computer-controlled anti-lock braking systems (ABS) are a recently developed safety feature. When sudden stops are made, the ABS prevents wheel lock-up. The system is comprised of wheel-speed sensors that monitor wheel rotation, computer-controlled hydraulics that pulse the brakes on and off rapidly, and the on-board computer.

Belts & Hoses

Belts & Hoses

Exposure to heat, vibration and contamination makes belts and hoses wear out faster than any other components in your car. That’s why regular inspections are so important. Here are the belt and hose types in your car, along with their applications.

Accessory Drive Belts

While some accessories in your car are electrically powered by the charging system, others use the engine itself as their power source. The power for these accessories is delivered by a system of pulleys and belts. Examples of these accessories are:

• Alternator
• Water Pump for engine cooling
• Power Steering Pump
• Air Conditioning Compressor
• Radiator Cooling Fan
• Many late model cars use a single serpentine belt in place of individual belts to drive these accessories.

Hoses

The hoses that convey your car’s fluids are made of two rubber layers with a layer of fabric in between. Typical hoses include:

• Radiator and Heater Hoses – These hoses convey coolant to the engine and heater core.
• Fuel Hose – As the name implies, this hose transports gasoline from the tank to the engine.
• Power Steering Hose – It connects the power steering pump to the steering gear.

Batteries

Batteries

We can help you choose the right battery for your vehicle and lifestyle. Our staff can safely and professionally install your battery and get you back on the road.

Your car’s electrical system powers everything from the ignition and fuel systems to accessories such as your radio, headlights and wipers. The electrical system is, in turn, powered by the engine. Here are the three key components of the electrical system:

Battery

• When your car’s engine is off, the battery provides the required power to the rest of the system, as well as during start-up (cranking). It also supplements the power from the charging system during periods of high demand.

Charging System

• This is the heart of the electrical system. It consists of three main components: the belt-driven alternator, various electrical circuits, and a voltage regulator. The alternator supplies power to the electrical system and recharges the battery after your car has started. Just like it sounds, the voltage regulator controls the voltage, keeping it within the operating range of the electrical system.

Starting System

• This system consumes more electrical power than any other in your car. The starting system consists of three components which work in tandem: the ignition switch, the starter relay or solenoid, and the starter motor. The ignition switch controls the starter solenoid, which activates the starter motor. The starter motor then turns the engine until your car starts.

Air Conditioning Service

Air Conditioning Service

It’s the first hot day of the summer. Uncomfortably shifting in your seat, you turn on that long-neglected AC knob, only to discover an unwelcome blast of warm air streaming out from the vents. A bad situation made worse: that’s when you turn to us—your air conditioning service and repair headquarters. Did you know that without regular maintenance an air conditioner loses about 5% of its original efficiency per year? This means that without proper maintenance, your air conditioning unit may be performing as poorly as other models that are years older! But there is good news: you can still recover most of that lost efficiency. Schedule an appointment with one of our factory-trained professionals—we understand all aspects of AC repair, from modern computerized components to environmental disposal concerns. Today’s AC systems are fairly complex, and new improvements are always being initiated. That’s why you need to turn to us, the qualified source for everything related to your air conditioning system. The following is a brief schematic of some of the basic components that comprise this system:

Compressor:

• The compressor is a belt-driven device that derives its name from compressing refrigerant gas and transferring it into the condenser. While basically acting as a simple pump, the compressor is the core of your vehicle’s air conditioning system.

Condenser:

• The condenser’s primary function is to cool the refrigerant. It is a heat dissipating apparatus that radiates heat released by compressed gases and condenses them into high pressure liquids. The location of your condenser depends on how new your car is, but typically it’s found at the front of the vehicle, directly in front of the engine cooling radiator.

Receiver (drier):

• The receiver is a metal container that serves as a storage receptacle for the refrigerant. It’s also referred to as a drier because it absorbs moisture from the refrigerant and filters out particles of debris and harmful acids that would otherwise harm your AC system. Commonly located on the liquid line of the AC system, you should change your drier every 3-4 years to insure quality filtration and prevent any damage caused by these detrimental chemicals.

Orifice tube/expansion valve:

• The orifice tube (also known as the expansion valve) is a controlling mechanism that regulates the flow of refrigerant throughout the system. In addition to this, it also converts high pressure liquid refrigerant (from the condenser) into a low pressure liquid, so that it can enter the evaporator. Generally located at the evaporator inlet, the orifice tube could also be found between the condenser and the evaporator, or in the outlet of the condenser.

Evaporator

• The evaporator is designed to remove heat from the inside of your vehicle; therefore it’s a heat exchanger that’s vital to your vehicle’s AC system (not to mention your comfort). The evaporator allows the refrigerant to absorb heat, causing it to boil and change into a vapor. When this occurs, the vapor is removed from the evaporator by the compressor, cooling your car and reducing humidity. Because the evaporator houses the most refrigerant in this heat transfer process, it is the most susceptible to corrosion by harmful acids. Usually this damages the evaporator beyond repair, which is why it’s imperative you see us to prevent this from happening.