Rockville Auto Repair

The internal combustion engine in your vehicle counts on two things that mix together to be burned in the engine for power: fuel and air.  Both are important, of course.  If you run out of fuel, your engine won’t run at all.  Since there’s plenty of air around, you won’t run out of air, but you could feel your vehicle’s performance suffer if the engine air filter starts to get clogged.  It's important that the air that enters your engine be free of dirt, dust, and debris to prevent damage to internal components.  That’s where the engine air filter comes in.  It prevents those particles from entering the engine, an important job that most people just take for granted. After a while, your air filter will get dirty, which results in less air reaching the engine.  Modern fuel injected engines can adjust the amount of gas to mix with the air that is getting in, so your fuel economy won’t change significantly.  What ... read more

Talk about exquisite choreography; it happens under the hood of your vehicle every time you take a drive.  Your engine’s many complex parts must work exactly together.  One key is a part called a timing belt, which enables the synchronizing of two of your engine’s components, the camshaft, and the crankshaft.   The timing belt coordinates the valves in your engine to open and close at the appropriate time to get exhaust out of the engine’s cylinders. Timing belts may also power the water pump and the oil pump.  The belt is made of rubber.  Some engines use a timing chain (made of metal).  Your vehicle’s manufacturer recommends an interval after which you should have your timing belt or chain replaced, and that service should be part of your vehicle’s regular maintenance.  It’s always better to replace it before it breaks rather than after.  After all, if your timing belt breaks while you’re driving down t ... read more

A clean connection is a wonderful thing.  Think of a good cell phone signal or an airline connection with ample time and short distance to the next gate. Good connections are also important for your vehicle’s battery, and one secret to that is to make sure it’s periodically cleaned. If it’s been a while since you have had any service to your battery, bring it in so we can inspect it for any corrosion that might have formed.  Corrosion on the battery terminals will affect the connection between the battery and your vehicle’s electrical system. The amount of corrosion you can expect can be influenced by such things as the kind of climate you live in (dry or humid, warm or cold), if there’s lots of salt on the roads and how old your battery is.   We have tools and chemicals to safely remove the corrosion for an optimal electrical connection. In order to reduce the amount of corrosion re-forming on the battery, we’ll apply a special protec ... read more

Ever wonder how your vehicle’s engine is able to take the 12-volts from its battery and ramp that up to as high as the tens of thousands of volts it takes to fire its spark plugs? The secret is something called an ignition coil.  Most newer vehicles have an ignition coil at each cylinder, but older ones have a coil that serves all of the spark plugs.  There are telltale signs that you have an ignition coil problem.  As you might expect, one symptom is it’s hard to start your engine or it won’t start at all.  If your engine is misfiring or not running smoothly or you see the Check Engine light come on, those all could point to an ignition coil failure. Several things can contribute to ignition coil trouble in addition to normal wear and tear. Moisture and dirt may have gotten inside the coil, plus the heat and vibration of your engine over time can contribute to them going bad.  Bad spark plugs or plug wires can also be a cause.   While ig ... read more

Ever wonder how your vehicle is able to move over bumps, potholes and other irregularities in the road and you hardly feel a vibration in the cabin? It’s your shocks and struts doing the hard work along with the rest of your suspension and tires.  They keep the ride smooth and are important for your vehicle’s safe operation.  So, how do you know when your shocks and struts are wearing out? One way is to look at the surface of your tire (where the rubber meets the road—where the tread is).  You might see some little indentations in certain spots, known as tire cupping.  If your vehicle takes longer to stop than it used to, takes a dive when you hit the brake pedal or bottoms out (scrapes) on a big bump in the road, that’s another sign, as are loud, odd noises. You may also notice your vehicle sways more than it used to. Every once in a while, look around at your shocks to see what shape things are in.  If you see the rubber cover cracked ... read more