AUTONET TV

Passing the Test (How to Prevent Emissions Test Failure)

Vehicle emission testing has become ubiquitous in North America and for a good reason.  Clean air quality is important for the environment and all of us.  Since vehicle emissions are among the main causes of air pollution, emission testing can alert you to problems in your vehicle than can be fixed so it won't needlessly pollute.

Emissions tests are looking for certain toxic gases internal combustion engines produce, such as nitrogen oxide, particulate matter, non-methane organic gases and formaldehyde.  Emissions control systems reduce these gases if they are working properly. 

The best way to minimize pollution is to keep those vehicle systems working properly, and periodic inspection and maintenance is the key.  So if you want to make sure your vehicle will pass an emissions test, it helps to know what might go wrong.

Let's start on the easy one.  Your gas cap could be loose, allowing vapors to escape into the atmosphere.  The most common solution is to replace it.  Or your air filter may be dirty.  A dirty air filter may push your hydrocarbons pass the acceptable level.

Now to the more complicated things.  The mixture of fuel and air in your engine may be tilted toward the "too much fuel" side.  That could cause problems for your vehicle's catalytic converter, a device that converts toxic gases from your exhaust into less toxic pollutants.

Your vehicle has a closed system that prevents fuel tank vapors from escaping into the air; it's called the EVAP system.  A technician can track down problems.

Vehicle engineers have gone to great lengths to minimize the amount of pollution your vehicle produces.  Your vehicle's manufacturer recommends how frequently those systems need servicing.  Keep those systems in good shape and you're likely to pass emissions tests with flying colors.  Neglect them and you might find your vehicle failing an emissions test.  When that happens, you'll have to get the problems repaired before you can get back on the road.

Madison Automotive
2457 Covington Pike
Memphis, TN 38128
(901)386-9600
http://www.madisonautomotive.net

Keep It Flowing with a Fuel Filter Replacement at Madison Automotive

The function of the fuel filter is pretty self-explanatory. It filters your fuel. The fuel filter is in the fuel line somewhere in between the fuel tank and the engine. Both gas and diesel vehicles around Memphis use fuel filters.

For more information about your fuel filter, visit Madison Automotive at 2457 Covington Pike in Memphis, TN 38128.
Please call (901)386-9600 to make an appointment.

Generally speaking there's not a lot of dirt in our Memphis area auto fuel supply, but there is enough that you want to screen it out. The problem actually gets worse the older your vehicle becomes. That's because dirt, rust and other contaminants will settle out of the fuel and onto the bottom of the fuel tank. After your vehicle is five years or older, it can actually have a fair amount of sediment built up.

That just means that the fuel filter has to work harder as your vehicle ages. It'll get clogged sooner and need to be replaced more often.

A symptom of a clogged fuel filter is that the engine sputters at highway speeds or under hard acceleration. That's because enough fuel is getting through around town, but when you need more fuel for speed, enough just can't get through the filter. Obviously, that could be dangerous if your car or truck can't get enough power to get you out of harm's way.

For just that reason, fuel filters have a bypass valve. When the filter is severely clogged, some fuel can bypass the filter all together. Of course that means that dirty, unfiltered fuel is getting through to be burned in the engine.

This dirt can then clog and damage your fuel injectors. Now injectors are not cheap to replace, so you don't want to cause them damage just because you didn't spend a few bucks to replace a fuel filter.

You know, in a way, the fuel filter can be the poster child for preventive maintenance. It's a little part, it's simple and it's cheap to take care of. But if it's neglected, it could lead to thousands of dollars in repair bills.

Those auto service schedules in your owner's manual are there for a reason. If ever you don't understand a recommended service, just ask your Memphis service advisor at Madison Automotive. We'll be happy to explain.

Madison Automotive
2457 Covington Pike
Memphis, TN 38128
(901)386-9600
http://www.madisonautomotive.net

To Fix or Not To Fix: That Is the Question.

No matter what vehicle you drive, when certain things break, you have to make a decision.  Should I get it fixed now, later or never?  Air conditioning is one of those things.  You can certainly live without air conditioning, but it sure is nice to have on a sweltering day.

Let's say your air conditioning breaks in the fall and you live in a climate where it gets quite cold in the winter.  Should you get it fixed now, wait until spring since it won't get warm until then or maybe not get it fixed at all?

That can be a tough decision.  There are several reasons air conditioning in vehicles break.  One is fairly simple: It could be an electrical problem, perhaps a relay or solenoid is not turning on the system.  It's also a fairly inexpensive repair and doesn't require hours of labor.

Or, the problem is that the coolant has leaked out.  Your service facility can find the leak and replace the parts that are leaking.  With a refrigerant recharge, you're back in business.  The repair costs vary, depending on the reason for the leak.

When air conditioning malfunctions involve a compressor, evaporator or condenser, the costs can be significant since parts and labor add up.  Depending on the age and value of your vehicle, you may choose to simply roll down the windows and live with it. 

Keep in mind that many vehicles in cold climates use air conditioning in winter.  Many vehicles automatically turn on the A/C when you use the defroster.  The A/C dries the heated air it blows on the windshield and side windows to eliminate fogging more quickly.  Outside conditions such as snow and ice can severely hamper visibility.  Add to that fogging on the inside and it can present very challenging conditions for the driver.

In order for all systems to be functioning optimally, a vehicle owner might feel it's worth it for safety reasons to get a broken air conditioner fixed, even if it is done right before the approach of cold weather.  Discuss these options with your service advisor so you can make the best decision for your situation.

Don't Stack the Mat

In the sloppy cold weather months, you might be tempted to pick up an all-weather mat and throw it on top of the mats you already have in your vehicle. After all, double protection is better, right? In this case, wrong. Here's why.

It's important to keep the accelerator and brake pedals clear so they can function the way they are supposed to. Stacking mats in the driver's side footwell can make them sit up too high on the floor. That can, in turn, jam your accelerator pedal forward, causing your vehicle to unintentionally speed up; it may get stuck in that position. Same thing applies to the brake pedal. The mats can get caught underneath it and prevent you from stopping.

Here are some other good practices when it comes to mats. It's best to get those designed for your vehicle. They are shaped to fit your specific car, truck, van or SUV. Ill-fitting mats can have the same untended consequences as stacked mats.

Good mats will have either a Velcro-type fastener on the back of them or a hook that fits into a hole in the mat. That way, the mat stays affixed to the floor so it doesn't slip and cause problems.

One more thing to keep in mind. If you have objects rolling around your vehicle, let's say under the driver's seat, just think about what happens when you jam on the brake. That object is thrown forward and can get caught in a pedal. You might find the accelerator stuck or the brake pedal inoperative.

Your service advisor at Madison Automotive can recommend the right mat for your vehicle. The right mat may save your carpeting, the wrong one may cost you an accident.

Madison Automotive
2457 Covington Pike
Memphis, TN 38128
(901)386-9600
http://www.madisonautomotive.net

Differential Service at Madison Automotive: Viva la Difference

Every vehicle on TN roads has a differential, and it is important to the proper operation of the vehicle.  But most Memphis residents don't have a clue what it is.

The differential compensates for differing wheel speeds. For example, when you turn, the inside tire on the turn travels a much shorter distance than the outside wheel. So the inside wheel of the vehicle must move at a slower speed than the outside wheel. Without a differential, the wheels would hop and scrape while turning.

Have you ever seen the large bulge in the middle of the rear axle of a truck? That's the differential. In a rear-wheel drive vehicle, the differential is located on the back axle. Four-wheel drive vehicles and SUV's have differentials on both the front and the rear axle.

You might expect that the differential is located on the front axle of a front-wheel drive vehicle. You'd be right. But the differential is called a transaxle on a front-wheel drive vehicle because its location allows it to be combined with the transmission.

In an all-wheel drive vehicle, an additional differential or transfer case is located between the front and rear axles. Differentials are strong: They have to be because of the job they do. But those tough parts need proper lubrication. You don't want your differential to seize up. That results in damage to your vehicle.

So you need to have your vehicle differential serviced regularly. It's not a complicated job. At Madison Automotive in Memphis, we've been servicing differentials for years. The used lubricating fluid is simply drained and then replaced. Some vehicles require specific additives in the differential fluid; your Memphis service center will ensure you are getting what your vehicle needs.

The intervals in time or mileage for servicing your differential vary greatly from vehicle to vehicle. Check with your owner's manual or Madison Automotive service advisor to find out how often your vehicle differential needs to be serviced.

Madison Automotive
2457 Covington Pike
Memphis, TN 38128
(901)386-9600
http://www.madisonautomotive.net