AUTONET TV

A.G. Automotive & Diagnosis Automotive Tips: Alternator

Your alternator makes electricity to start and run your engine and all of the vital electrical systems in your vehicle. That’s everything from the on-board computers to the turn signals. And of course there is the entertainment system, seat heaters, power windows and everything you plug into the power outlets. After your alternator makes enough electricity to do all that, it recharges your battery with what’s left over.

When Winnetka drivers constantly have a low or dead battery, the alternator is usually a prime suspect. However, the alternator is just one vital component of the starting/charging system, and a problem with any of the other components could be the actual cause.

In addition to the alternator, the charging/starting system includes the battery, starter, serpentine belt system and all of the electrical cables that connect them. Your A.G. Automotive & Diagnosis service advisor has a systematic process of testing components and connections to get to the source of your trouble. The initial symptoms determine where to begin the diagnostic process, and he follows the procedure until he tracks down the culprit.

For example, diagnostic tests at A.G. Automotive & Diagnosis could reveal that the alternator is not generating enough electricity to keep the battery charged. Is the alternator bad? Not necessarily. A worn serpentine belt tensioner could be allowing the belt that spins the alternator to slip. So the perfectly good alternator is not spinning at the proper speed. The solution for Winnetka drivers is to replace the serpentine belt system – not the alternator.

The good news for Winnetka drivers is that our highly-trained technicians at A.G. Automotive & Diagnosis can properly diagnose all your vehicle troubles and make the necessary repairs to get you back on the road in Winnetka.

Give us a call.

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com

U and your U-Joints (Lubricate U-Joints)

If your vehicle’s power goes to the rear wheels, then you have something called U-joints in the drivetrain. U-joints are connectors that allow the rotating power from your vehicle’s engine to deliver its power through a driveshaft to make the rear wheels rotate.  You need U-joints because the surfaces you drive on aren’t perfectly flat, and the driveshaft has to allow for some flexibility when you are traveling over uneven surfaces.

As you can imagine, the U-joints have to move and flex a lot as your vehicle is going down the road.  They have bearings in them to allow that flexibility, and those bearings are lubricated when your vehicle is made.  Some U-joints have lifetime lubrication and are not designed to be serviced.  When they fail, they have to be replaced.  Others have grease fittings on them that need periodic lubricating by a technician at intervals recommended by your vehicle’s manufacturer. 

There are signs you can look for that your U-joints need attention.  You may hear a clunk when the gears shift into drive or reverse.  You may feel your vehicle vibrate as you move down the road.  Other signs are leaks at the back of your transmission or a banging sound right before you lose power.  Sometimes, though, if you wait until you notice these symptoms, the U-joints may already be damaged.  

That’s why it’s important that your vehicle’s U-joints be periodically inspected and lubricated.  At the same time, a technician should thoroughly inspect the driveshaft and other connected components.  

Keep your U-joints in good shape, and both of U will continue to enjoy years of reliable transportation.

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com

Plugging Away (Spark Plug Replacement)

If you drive a vehicle with a gasoline engine, thank the spark plugs for igniting the gasoline/air mixture in each cylinder that keeps your vehicle traveling smoothly down the road every day.  Your spark plugs work hard, firing thousands of times in a well-choreographed order, and you usually don't pay much attention to them until one of them stops working the way it should.

Signs that spark plugs are wearing out include:

• Engine runs more roughly than it did
• Vehicle doesn't start as easily as it used to
• Vehicle hesitates when you press on the accelerator
• Your fuel economy has gotten worse

When a spark plug stops working altogether, you will find your engine has likely lost a lot of its power and isn't running smoothly.  Your Check Engine light may  come on.  Then it's time to head to come to our service center to have it diagnosed.

If your plugs need to be replaced, they're usually done all at the same time. And if your vehicle has spark plug wires, experts recommend you change them as well. Different type of spark plugs last longer than others, and your service advisor can discuss what's best for your vehicle and driving habits.

A technician will also determine if there are any carbon deposits on your plugs, how healthy the ignition coil is (it's the part that supplies the high-voltage jolt that makes the spark) and will look for other signs and symptoms that may point to other problems in your engine. For instance, if a spark plug is fouled by oily deposits, it's possible oil is getting into the combustion chamber. 

They will also check all the plugs to see if there are problems in just one or all cylinders.  Sometimes a technician will find a plug that has overheated, literally melting the metal.  In that case, they may recommend they correct that problem before replacing the spark plugs.

Most spark plugs will last for a good, long time.  Even if you aren't seeing any symptoms they're wearing out, make sure you have your service advisor check your vehicle manufacturer's recommended maintenance intervals.  Preventative maintenance will keep your vehicle running reliably so you can count on it to get you where you want to go. 

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com

Command Performance (Engine Air Filter)

The internal combustion engine in your vehicle counts on two things that mix together to be burned in the engine for power: fuel and air.  Both are important, of course.  If you run out of fuel, your engine won’t run at all.  Since there’s plenty of air around, you won’t run out of air, but you could feel your vehicle’s performance suffer if the engine air filter starts to get clogged. 

It's important that the air that enters your engine be free of dirt, dust, and debris to prevent damage to internal components.  That’s where the engine air filter comes in.  It prevents those particles from entering the engine, an important job that most people just take for granted.

After a while, your air filter will get dirty, which results in less air reaching the engine.  Modern fuel injected engines can adjust the amount of gas to mix with the air that is getting in, so your fuel economy won’t change significantly.  What will change is how well the engine performs, its acceleration.  In one test, a US Department of Energy study showed that a dirty air filter reduced a vehicle’s get-up-and-go by as much as 11 percent.  

The company that made your vehicle includes guidelines in your owner’s manual on how frequently that filter should be changed, and doing so will maintain your engine’s performance. If you drive in dusty, dirty areas or those with a lot of industrial pollution, we recommend you replace the engine air filter more frequently than the manufacturer’s recommendations.  

When you bring your vehicle to us for regular maintenance, we will routinely check several components, including your engine air filter, and recommend a change when we see signs it’s needed. It’s good for your engine, and you’ll enjoy the performance you expect.

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com

Positive Crankcase Ventilation ? PCV Valve Service at A.G. Automotive & Diagnosis

Hello Winnetka! Did you know that the first federally-mandated emissions control device was introduced in the 1960's? The Positive Crankcase Ventilation valve, or PCV valve, has been installed in CA vehicles since 1964 and represents the first legislation by the United States government to regulate harmful emissions as well as to improve performance in the country's vehicles.

The PCV valve, as you can probably guess, is located on the crankcase. The crankcase is the lowest part of a vehicle's engine. It houses the crankshaft and the engine oil. The crankshaft connects to the pistons that power the engine.

Pistons are pushed down when fuel is burned in an engine. This causes the crankshaft to rotate, which sends power to the transmission.  It ultimately turns the axles and causes the vehicle to move. Some of the gases released by the burning fuel squeeze around the pistons and down into the crankcase.

If the escaped gases mix with the engine oil in the crankcase, oil sludge develops. This sludge has the consistency of petroleum jelly and can cause damage by clogging up passageways in the engine. Further, escaped gases can build up pressure inside the crankcase that can blow out seals and gaskets.

Before 1964, a hose was attached to the crankcase that vented escaped gases out into the air. These gases contained about 70% unburned fuel as well as harmful emissions. The PCV valve was designed to curb these harmful emissions as well as recapture unburned fuel.

The PCV valve is a small, one-way valve that allows escaped gases to exit the crankcase. The gases are then routed into the intake system so they can be re-burned in the engine. Fresh air enters the crankcase through a breather tube to facilitate this circulation and keep the air in the crankcase clean.

The PCV valve, like most working parts on a vehicle, will wear out over time. Usually it simply gets gummed up. Preventive maintenance, including routine oil changes at A.G. Automotive & Diagnosis in Winnetka, will extend the life of the valve, but eventually it will have to be replaced. A sticking PCV valve won't allow gases to circulate properly, which can increase pressure in the crankcase. Over time, that pressure will lead to oil leaks.

Your vehicle manufacturer recommends that a PCV valve be replaced every 20,000 to 50,000 miles (32,000 to 80,000 kilometers), depending on the vehicle and Winnetka driving conditions. It's an inexpensive repair but may not be included in the maintenance schedule in your owner's manual.  So if you're looking for auto advice about the PCV valve, you may have to ask our pros at A.G. Automotive & Diagnosis.

Taking care of our PCV valve protects the environment in CA and improves vehicle performance. It's just part of good vehicle care for Winnetka drivers and a way all of us can do our part to improve the world we live in.

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com