AUTONET TV

Not-So-Common Sense (Sensor Failures)

So your vehicle won't start.  What's the first thing that comes to mind?  Battery dead? Starter motor worn out? Out of gas?  Well, those are all reasons that make sense.  But your vehicle may be refusing to start because one of its computers is being warned that to do so might damage it.  Here's how that works.

You have lots of computers in your vehicle.  They need to know the status of things so there are several sensors monitoring various things going on.  These sensors send information to the computers that adjust the fuel and air mixture so you don't waste fuel.  They know when things aren't quite right and prevent you from starting your engine if that's going to damage it. 

Other sensors make sure the coolant is the right temperature, check to see you are not polluting the air and make sure other electronic components are performing their tasks correctly.

Here's an example of a sensor doing its job.  Your engine needs oil to lubricate metal components so the friction doesn't damage them.  Your engine has an oil pressure sensor that tells a computer called the Electronic Control Unit (ECU) if things are good to go or if there's something wrong, maybe the oil pressure is too low to keep things lubricated.  If it is, it gives a signal for the vehicle not to start, protecting the engine. 

Of course, the sensors can go bad, too, with some of the same results.  And so someone has to figure out if it's the sensor that's failed or if it really has detected a problem.  That is the challenge for technicians with specialized equipment to decipher the signs.  If a bad sensor is found, it may need to be replaced.  Sometimes a thorough cleaning can do the trick.  In either case, your service facility can track down the problem and get you back on the road.  Makes sense, doesn't it?

Jud's Best Auto Service
895 W Liberty Street
Medina, OH 44256
(330) 722-5100
http://www.judsbest.net/

Keep Your Medina Car Breathing Free: Engine Air Filter

Hey Medina - this is something really amazing: Your vehicle uses 12,000 times as much air as fuel when you drive it. All of that air has to be filtered to keep your engine clean.

That's like 100 gallons (380 liters) of air every block! The engine air filter is just another example of a very important but inexpensive part that has to do a tremendous amount of work. And when it works, everything goes well. But, when it doesn't, well, it can lead to problems. Of course, your vehicle manufacturer recommends how often to change your air filter. But like most service intervals, where and how you drive your vehicle in OH affects when your filter needs to be changed.

Dusty conditions around Medina or polluted city driving means you'll need to change your filter more often. Our trained professionals at Jud's Best Auto Service can check your filter for you. In fact, it's often a routine part of an oil change.

When you think about it, a clogged air filter won't allow as much air through as a clean filter. Your vehicle needs this air to efficiently burn its fuel, giving you better fuel economy and performance.

Dirtier filters don't work as well as clean ones. A filter can only hold so much; after that, it allows dirt to pass right into your engine. Air filters come in all shapes and sizes. They also come in different grades. There are high performance air filters available for most vehicles. These high performance filters cost a little more, but they increase horsepower and may improve fuel economy to boot.

So it's important for Medina drivers to make sure and have their air filter checked. If it needs replacing, it doesn't cost very much at Jud's Best Auto Service in Medina and it should easily pay for itself in better fuel economy before your next oil change.

Jud's Best Auto Service
895 W Liberty Street
Medina, OH 44256
(330) 722-5100
http://www.judsbest.net/

Fuel Injection: It Keeps Getting Better for Medina Drivers

Medina residents know that engines need to burn fuel to operate. Fuel is pumped from your fuel tank to your vehicle 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 air—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 vehicle engine.

Direct injection engines burn fuel more efficiently than conventional vehicle 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 gas mileage. The turbocharged version delivers 350 horsepower.

Why the big difference in power? Direct injection systems allow fuel to be squirted into the vehicle 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.

Fuel injectors are precision instruments. They have to deliver the right amount of fuel at exactly the time the vehicle 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 as well as delivering less power to the engine.

Medina residents should understand that fuel injectors are not cheap to replace. Direct injection fuel injectors are even more . 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. 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. 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, Medina drivers will enjoy better fuel economy and their fuel injectors will last for a long time.

Contact us for more tips to help you improve your performance and safety.

Jud's Best Auto Service
895 W Liberty Street
Medina, OH 44256
(330) 722-5100
http://www.judsbest.net/

Odometer Rollback on Your Medina, OH Vehicle

How do Medina drivers know if an odometer is telling the truth?

Well, back in '86, Congress passed the Truth-in-Mileage Act to protect OH consumers against mileage fraud. It says a OH seller must certify the mileage reported is the actual mileage.

To have your odometer checked in Medina, OH, stop by Jud's Best Auto Service:

Jud's Best Auto Service
895 W Liberty Street
Medina, OH 44256

If it isn't, the seller must say why; for example, maybe the odometer is past its mechanical limits. Some older odometers only go to 99,999 and then start over at 0. Or, the odometer has been tampered with, broken or replaced.

If the seller tells you the mileage isn't accurate, there's not much chance of putting a good number to it. And there's the unscrupulous seller who claims the reading is true, but it isn't. What can Medina vehicle owners do?

You can go to www.CarFax.com, where, for a small fee, they'll give you a comprehensive vehicle history search on your vehicle, showing local Medina, OH, ownership history, accident reports, total-loss events, manufacturer buybacks, Lemon reports and warranty status.

You can get a mileage history by checking with the local OH DMV (or wherever you happen to be) and other verified sources looking for inconsistencies in the mileage reported when the car was bought and sold. If there are signs of odometer rollback, now you'll know.

If so, proceed with caution. Or, negotiate a lower price. Or just walk away. There's always another vehicle.

Jud's Best Auto Service
895 W Liberty Street
Medina, OH 44256
(330) 722-5100
http://www.judsbest.net/