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Advantage Auto Repair
3155 N. Stone Ave.
(Intersection of Ft. Lowell and Stone Ave.)
Tucson, AZ 85705

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Automotive Repair Blog

August 2015

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Fuel Injection Keeps Getting Better for Tucson Motorists

Posted: Sep 01, 2015

Tucson residents know that engines burn fuel to operate. Fuel is pumped from your fuel tank to your engine where it is squirted—or injected—into your engine's cylinders. This is the function of the fuel injectors.

There are two ways to inject fuel into an engine. Fuel needs air to burn, so in the first method, fuel is injected into a port and allowed to mix with airand before it is drawn into the cylinders. In the second method, fuel is injected directly into the cylinders and mixes with air after it enters the engine.

Direct injection engines burn fuel more efficiently than conventional engines. Some models can deliver the power of a V8 with the economy of a V6.

For example, in one family of engines, the conventional version (a V6) delivers about 250 horsepower. The direct injection version delivers over 300 horsepower and gets about the same . The turbocharged version delivers 350 horsepower.

Why the big difference in power? Direct injection systems allow fuel to be squirted into the engine at hundreds of times the pressure of a conventional engine. This atomizes the fuel better (breaks it down into tinier droplets), which means more of it gets burned, which translates to more power for your engine. It also results in cleaner emissions and improved fuel economy.

Fuel injectors are precision instruments. They have to deliver the right amount of fuel at exactly the time the engine needs it. They are also engineered to inject fuel with a specific spray pattern. This spray pattern allows for maximum fuel efficiency and proper atomization.

Direct injection engines require a much higher degree of precision than conventional engines. For this reason, they are equipped with more sophisticated computers.

When fuel injectors get dirty, their precision drops off. The spray pattern won't be precise, and the timing of fuel delivery may be off. This decreases fuel efficiency and fuel economy for Tucson drivers as well as delivering less power to the engine.

Fuel injectors are not cheap to replace. Direct injection fuel injectors are even more expensive. And we're talking a mortgage payment to buy a set of new fuel injectors for a diesel engine.

So keeping your fuel injectors clean is just good auto advice for Tucson residents. The best way to do this is to change your air and fuel filters regularly and practice other habits of good vehicle care and preventive maintenance at Advantage Auto Repair & Transmisson in Tucson. Cleaning additives in your fuel can also help.

If you do end up with gum or varnish in your fuel system, you'll need a professional fuel system cleaning. This will clean out your whole system, including the injectors. The good news is that with proper maintenance, your fuel injectors will last for a long time.

Advantage Auto Repair & Transmisson
3155 N. Stone Ave.
Tucson, AZ 85705
520.807.5555
http://www.advantage-autorepair.com


Advantage Auto Repair & Transmisson Engine Air Filter Replacement

Posted: Aug 19, 2015

When your experienced Advantage Auto Repair & Transmisson technician changes your oil, he will also inspect your air filter. You shouldn't need a new air filter at every oil change, but you will need to change it regularly. Heed your technician's auto advice if they tell you to change your air filter.

An air filter does what its name implies: it filters stuff out of the air. Air is drawn into your engine through the filter because your engine needs air to burn fuel. If the filter weren't there, a lot of dust and debris would come into the vehicle engine with the air when you are driving around Tucson. That dust and debris would get hot, burn and produce all kinds of ash and gumminess that would eventually clog up your engine.

Drop in an air filter and voilá! Problem solved.

But air filters themselves get clogged up with all the junk they clean out of the Tucson air. This doesn't allow the junk into the vehicle engine, but it does block up the airflow. A blocked airflow will reduce engine efficiency.

Tucson residents who get a charge out of the feeling of power in their engine might consider upgrading their air filter. Talk to your friendly and knowledgeable Advantage Auto Repair & Transmisson service advisor. Premium air filters have been proven to increase horsepower and torque. So with the cost of a premium air filter, you can increase the horsepower in your engine — there's no cheaper way to do that!

It's also one of the simplest elements of routine preventive maintenance – and it protects against damage to expensive vehicle electronic systems. No Tucson resident should have an excuse to drive around AZ roads and highways with a dirty air filter.

Advantage Auto Repair & Transmisson
3155 N. Stone Ave.
Tucson, AZ 85705
520.807.5555
http://www.advantage-autorepair.com

 


The Advantage Auto Repair & Transmisson Guide to Servicing Your Differential

Posted: Aug 19, 2015

Differential? What's that? And what's it for? I've been told by my service advisor that I need to get it serviced, but is that on the level?

Do these questions sound familiar? They're not uncommon for Tucson drivers. A lot of us in Tucson don't know what a differential is or what it's for. Every vehicle has a differential, and, yes, it does need to be serviced. In fact, it's more important to the operation of your vehicle than the air conditioner or windshield wipers.

A differential allows your vehicle tires to move at different speeds. This happens more than you think. The best example is when a vehicle is turning. The inside wheel travels a much shorter distance than the outside wheel during a turn. This means the outside wheel has to move faster than the inside wheel. Without a differential, your tires would hop and skip while turning. They would also lose traction in sand or snow.

The location of your differential depends on what kind of vehicle you drive. On a rear-wheel drive vehicle, the differential is located in the back. For a front-wheel drive vehicle, it is located on the front, but it is usually called a transaxle. Four-wheel drive vehicles have three differentials: one on the front, one in the back and one in the middle. This center differential compensates for differences in speed between the front and rear wheels.

Your differential contains strong gears that need to be protected from dirt, debris, water and other contaminants. A differential is sometimes referred to as a “gear box.” The work of these gears is to transfer power from the vehicle drive train to the wheels.

Your differential needs fluid to lubricate and cool the gears. This fluid, even though enclosed in the “gear box,” can get dirty because the gears grind down over time, releasing tiny bits of themselves into the fluid. Also, the additives in the differential fluid break down and need to be replaced. That's why preventive maintenance for your vehicle needs to include servicing the differential.

Your owner's manual can give you recommendations on how often to service your differential. But you should also consult with your friendly and knowledgeable Advantage Auto Repair & Transmisson professional. Advantage Auto Repair & Transmisson can give you some good auto advice on whether your vehicle needs to be serviced more frequently. For example, if you drive in hot or cold AZ weather conditions, your differential will need to have its fluid changed more often.

Severe conditions will also affect your vehicle care routine and your differential. Check your owner's manual for a definition of “severe service” conditions that affect your vehicle. Examples may include driving with frequent stops and starts, a lot of short trips around Tucson, hot or cold AZ weather conditions and towing.

Off-roading is particularly hard on a vehicle's differential. If you are an off-roader, especially if you cross AZ streams or waterways, it is important that you service your differential more frequently than the recommendations suggest.

Properly servicing your differential will extend its life and keep you out of Tucson auto repair shops. A smooth ride is the result of proper preparation and smart choices.

 Advantage Auto Repair & Transmisson
3155 N. Stone Ave.
Tucson, AZ 85705
520.807.5555
http://www.advantage-autorepair.com

 


Busting Automotive Myths in Tucson, AZ

Posted: Aug 06, 2015

Myths passed around our Tucson, AZ community start with a grain of evidence and are then built up with a lot of imagination and very elastic logic. And the internet is a breeding ground for automotive myths. Some bloggers recall the vehicles of yesteryear and declare their modern decedents to be virtually maintenance free and that anyone who says otherwise is out to rip you off.

To get the truth about auto myths you hear around the Tucson area, come over to Advantage Auto Repair & Transmisson.


Let's examine a couple of the more popular rants and look at the truth behind them.

The first one is that the chassis no longer needs lubrication for suspension, steering and the driveline. They declare that anyone who has charged you for lubrication is a charlatan.

The truth on which this myth is based is that many new vehicles come from the factory with sealed joints and cannot be greased. However, there are still some grease points on many cars around Tucson. A grease fitting may have been installed in conjunction with a repair. And most trucks and truck-based SUVs driving in Tucson still require chassis lubrication. This is because they are more heavy duty and proper greasing is still required to keep them going.

Another common rant you'll hear around Tucson is that modern vehicles don't need tune-ups. That depends on your definition of a 'tune-up', which has changed as technology has progressed. Before engine control computers, electronic ignition and fuel injection, a tune up meant replacing mechanical parts that wore out. Service technicians at Advantage Auto Repair & Transmisson would manually adjust fuel and air mix and timing. When these adjustments were off, spark plugs would foul and need to be replaced.

This definition just doesn't apply to modern vehicles. Service centers like Advantage Auto Repair & Transmisson generally consider a tune-up to be the major service visit, recommended by your manufacturer, every 30,000 miles (50,000 kilometers) or so.

Of course you can't lubricate a sealed joint. Of course you can't adjust a carburetor if your car doesn't have one. You probably don't need to change spark plugs every year if your manufacturer says they can go 30,000 miles (50,000 kilometers). What are these bloggers getting so worked up about?

The danger with these modern-day myths is they prevent people in our local Tucson community from taking care of the routine preventive auto maintenance that manufactures recommend. Check out this partial list of things you still need to do to take care of your car. How many of them are really any different today than they were 20 or 30 years ago?

Oil change, cooling system service, transmission service, tire balancing, tire rotation, wheel alignment, suspension service, power steering service, proper tire inflation, brake service, differential service, battery maintenance, engine air filer, PCV valve, breather element, fuel filter, belts, hoses, timing belt, windshield wipers . . .

You get the picture. Your vehicle is still a machine that needs to be maintained. And, hey, your service advisors at Advantage Auto Repair & Transmisson have always adapted to keep pace with automotive technology. Next time you come across an angry voice about your car care, talk to your Tucson service advisor at Advantage Auto Repair & Transmisson, or do some research of your own.

Advantage Auto Repair & Transmisson
3155 N. Stone Ave.
Tucson, AZ 85705
520.807.5555
http://www.advantage-autorepair.com


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