AUTONET TV

I'm Cool With That (AC Exchange)

On a hot day, you want your vehicle's air conditioning to work.  When the air blowing out of your vents isn't cold, it's easy to think, "I'll just take it by the shop and have them top off my refrigerant." But while some people think air conditioning is that simple, it's actually not.

If your refrigerant is low, something has to have happened for it to be depleted.  Perhaps there's a leak in the system.  Or some hoses or clamps have failed.  If the system isn't evaluated by someone who knows air conditioning, it's possible that adding refrigerant will just be a band-aid solution.

It's also possible that contaminants have gotten into the refrigerant, such as carbon dioxide, nitrogen, argon, or air.  Some of those gases do not condense like refrigerant does which can increase the pressure inside the system and strain the lines and other components. At that point, the best course of action may be to have the old refrigerant (with its contaminants) bled from the system and have your AC recharged with new refrigerant.

Bring it to us, and we can inspect and test the system and all its components.  That will include a pressure test for leaks.  Most vehicle manufacturers don't have a service schedule for air conditioning systems, so one way to know when you should have it looked at is when it's not behaving the way it used to.  For example, it may not get cold as fast as it did before or even at all.

So, when hot air is exiting your vents when you want it to be cold, schedule an appointment and have a trained technician take care of it.  Are you cool with that?

Ken's Auto Center
9555 Black Mountain Road
San Diego, CA 92126
8585788200

Take Charge! (Battery Testing)

OK, so you probably take your vehicle's battery for granted.  Turn the key or push a button and it starts right up.  During times of warmer weather, you probably think your battery can take it easy.  But it may surprise you to learn that hot weather can be much harder on a vehicle's battery than cold.  So it's wise to know what condition your battery is in BEFORE you find out the hard way—being stranded by a dead battery.

Your vehicle's battery won't last forever; an average battery will last 3-5 years.  When's the last time yours was replaced? You probably have no idea.  Your vehicle will usually give you some hints that it's in need of attention.  See if any of these are familiar:

• your engine doesn't turn over as quickly as it used to
• your headlights are a little dimmer
• your Check Engine or Battery dashboard light is on
• you hear a click when you try to start your vehicle
• some electrical equipment in your vehicle isn't behaving the way it used to
• your engine smells like rotten eggs
• the terminals on your battery are corroded
• your battery was made more than 4 years ago

Even if there are no signs your battery is on its last legs, it's a good idea to have it periodically checked at your vehicle service facility, at least once a year. A technician will check the date it was made (it's on the battery's case). They'll inspect your battery, cables and connections, looking for corrosion, bulges in the battery or any other abnormal signs.

Using special diagnostic equipment, the technician can run some tests on your battery and vehicle's electrical systems. They can measure how fully charged your battery is and how much potential it has to hold a charge.  Then, your service advisor will tell you how much more life to expect from your battery or recommend it be replaced. 

It you need a new one, your service advisor can recommend options for you. Important factors include brand, warranty, where the terminals are on the battery, the ability to handle different cranking loads and temperature ranges.  Bet you didn't know vehicle batteries can be that different!

Ken's Auto Center
9555 Black Mountain Road
San Diego, CA 92126
8585788200

Go with the Flow (MAF Sensor Replacement)

If your vehicle has an internal combustion engine, it depends on two things to make propulsion power for you to be able to motor on down the road: fuel and air.  The engine mixes the two in just the right proportion so that they can be ignited, creating a series of tiny explosions that are coordinated in such a way that your vehicle moves steadily ahead.

One of the key parts to making sure that mixture of air and fuel is correct is a little tube that measures the amount of air that’s coming into the engine.  It’s called a Mass Air Flow sensor, or MAF sensor.  There are two wires in this tube, one of which is heated up with electricity and the other isn’t.  When the air flows over the heated wire, it cools.  When the temperature of the two sensing wires is different, the MAF sensor either increases or decreases the current to the heated wire to try to make it the same as the other wire. That’s sent to a small computer that tells the engine to change the amount of air going into the engine.

Some signs of an MAF sensor problem?  Your vehicle doesn’t have as much power as it used to, or your fuel economy might drop.  Your vehicle may not start,   and the Check Engine light may come on.

If you spot these signs, it’s important to bring your vehicle in so we can check things out.  At the same time a technician looks at the MAF sensor, they’ll also check the connector that runs to the engine’s computer and replace it if necessary. They’ll also inspect other parts of the system, such as hoses, for problems.  

By the way, one way to minimized MAF sensor problems is make sure your vehicle’s engine air filter is regularly changed. That can help you be sure that the air that gets to your vehicle’s engine is clean.

Ken's Auto Center
9555 Black Mountain Road
San Diego, CA 92126
8585788200

Straight Ahead (Wheel Alignment)

If every road was straight and smooth, we wouldn't have to worry much about wheel alignment. But they're not, so we do.  Hitting potholes or driving on rough pavement can knock your vehicle out of alignment and you'll notice it in one of several ways.

Your steering wheel may not be centered when you're driving straight ahead, or your vehicle may pull to one side.  You may find your tires wearing on one side or they may squeal.  All are signs that could point to you needing an alignment.

Your wheels should be perpendicular to the road and parallel with each other.  If not, your tires will wear out faster and your vehicle won't go straight on a level straightaway.

In alignment, there are several factors that must be checked.  One is camber.  Your wheels should be straight up and down if you look at them from the front. If not, you'll wear your tires unevenly on one side.

Another factor is caster, the angle of the steering pivot.  Most vehicles have what's called positive caster, when the top of the steering pivot leans toward the rear.  Proper caster balances steering effort, stability on the highway and cornering.

You may have heard the term "toe" in reference to your wheels.  If you looked at your front wheels from straight above, for example, imagine your wheels were your feet.  If you were to turn your toes in toward each other, that would be toeing in.  The toe of your vehicle should be set to manufacturer's specifications so your vehicle handles well and doesn't prematurely wear out tires.

It's a good idea to have your alignment checked periodically since it can get knocked out by one hard knock or a lot of little knocks.  It's not just about tire wear, it's about ride comfort and safe handling. You may say a vehicle aligned just feels divine.

Ken's Auto Center
9555 Black Mountain Road
San Diego, CA 92126
8585788200