AUTONET TV

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