Memphis Auto Repair

For those of you in Memphis, Tennessee who pay attention to these things, you may have been hearing about the new direct injection engines and want to learn more about them. Some deliver the power of a V8 with the economy of a V6.For example, in one family of engines the conventional V6 makes about 250 horsepower. The direct injection version of the same engine makes over 300 horsepower and gets essentially the same fuel economy. The turbocharged version makes over 350 horsepower.So what are the differences from a conventional engine?The core difference is in the fuel injection system. The system most vehicles use now is called a port injection system. The fuel injector squirts fuel into a port just outside the cylinder where it's then drawn into the engine with the air.With a direct injection system, the injector squirts the fuel directly into the cylinder. The gain in power and economy come because fuel injected directly into the cyli ... read more

The last new American vehicles sold in Memphis with a carburetor rolled out of the Tennessee dealerships in 1990. Since then, all new vehicles here in Memphis, and nationally, have had fuel injectors. In very simple terms, a fuel injector is a valve that squirts fuel into your engine. Your engine control computer tells the fuel injector how much gas to deliver as well as the precise time it should be delivered. Of course this happens thousands of times a minute. Fuel injectors deliver fuel far more precisely than carburetors. That translates into better fuel economy and more power for Memphis drivers. Virtually all fuel injectors for gas engines are known as port fuel injectors because they deliver the fuel to a port just outside the cylinder. Port fuel injectors operate at about 40 to 80 pounds per square inch of pressure.A few vehicle manufacturers have introduced gas direct injection systems on some engines recently. These systems inject the ga ... read more

Your fuel system needs to be clean to do its job properly. When it gets dirty, the results are lower engine performance, reduced fuel economy and impaired safety. It can even lead to costly repair bills for Memphis drivers. So keep your fuel system clean as part of your routine preventive maintenance.Fuel injectors have replaced carburetors in most of today's vehicles. These injectors deliver better fuel economy than a carburetor, but they can be compromised by rust, dirt and other contaminants. They need to be clean to maintain the correct pressure, spray pattern and volume of delivered fuel so that the vehicle engine can run at peak efficiency.There are products on the market that Memphis vehicle owners can add to their gas tank that will help keep your fuel injectors clean. These products will keep a clean fuel system clean but have trouble cleaning a system that has already gotten gummed up.If your fuel system needs a major cleaning, Allen's Automotive Center can h ... read more

There's a lot of auto advice in Tennessee right now on how to save money on gas. Some of it is good advice. Some of it isn't. Some of it is myth. And it may well be a scam. Plain and simple. When someone offers you a product designed to save money on gas, ask yourself, “Does this sound too good to be true?” If the answer is yes, do more research.The internet offers us a convenient and quick way to research someone's claims about gas savings. Memphis drivers can usually find out in only minutes whether that claim is questionable or not.Chances are other Memphis drivers have already tried what you're being offered. If you find evidence that others feel they have been scammed, you should be wary of becoming the next victim. There aren't any pills, magic or otherwise, that you can drop into your gas tank to improve your gas mileage. Drop in enough of those pills and you can actually harm your vehicle. The last thing you need is a bunc ... read more

Is your vehicle sometimes hard to start early in the morning? When you turn the key, does it hesitate or stutter? If so, the problem could be the result of a dirty fuel system. Your vehicle's fuel system starts with the air filter and ends in the top of your engine. Over time, different parts of the system get dirty, which robs you of performance and hurts your fuel economy. Most Memphis vehicles have fuel injectors, rather than a carburetor. Fuel injection systems have fewer problems and require less adjustment. But they still need to be properly maintained. This is why your owner's manual has a schedule for cleaning your fuel injectors and other parts of your fuel system.Some Memphis residents are interested in buying fuel system cleaners that they can pour into their gas tank. You can do that - and there are lots of great products available that can help maintain an already clean fuel system - but these products cannot do a major cleaning. For that, you need to see Allen's ... read more

Memphis 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.Wh ... read more

Let's talk about alternative fuel vehicles. In their quest to reduce the use of fossil fuels and harmful exhaust emissions in our Tennessee environment, automakers will have a number of alternatives for Memphis drivers very soon.For instance, Flex Fuel vehicles are already available in the Memphis area. Flex Fuel vehicles can run on gasoline or on E85 fuel. E85 is a mixture of 85 percent ethanol and 15 percent gasoline. The ethanol is made from corn. The benefits to Memphis drivers are in using less petroleum and reduced pollution. The drawbacks are that E85 gets lower gas mileage and when gas prices are low, E85 can be more than straight gasoline.Memphis drivers should only use E85 if they have a Flex Fuel compatible engine. Flex Fuel vehicles have special seals and gaskets that can stand up to the high alcohol content of E85. Using E85 in a regular engine can lead to gas leaks and fires.Diesel engines have been around Tennessee ... read more

The team at Allen's Automotive Center in Memphis, and Tennessee car owners are all talking right now. Better gas mileage. Fewer emissions. Memphis drivers want to save the environment and their pocketbooks.And we all know—or should know—that preventive maintenance will help maximize fuel economy. But is there something more people in Memphis can do? After all, some of us folks can't cut back on our driving, and others would like to do more to economize.Weight is one major enemy of fuel economy. The more you lug around in your vehicle, the more fuel you have to burn to get from point A to point B. And that means buying more gas in Memphis and producing more emissions.Of course, your vehicle's weight isn't negotiable. And you can't do much about the weight of your passengers. And this isn't an article about diet and exercise.But look around your vehicle. Are you hauling a bunch of unnecessary weight around? Do you really need your golf clubs every ... read more

A fuel injector is a valve that delivers fuel to a vehicle's engine. It has to deliver the precise amount of fuel to precisely the right place, precisely when the engine needs it. The fuel also has to be mixed with air before it can burn in the engine.Fuel injectors are engineered to spray fuel in a specific pattern into the engine. (The pattern varies by engine type and design.) In order to achieve these spray patterns, the fuel must be pressurized.The pressure in a fuel injection system varies depending on its type. Many gasoline engines use port injection systems, which operate with a pressure of 60 pounds per square inch. Newer direct injection systems operate at 10 to 30 times that pressure. Some diesel passenger vehicles have fuel injectors that operate at 30,000 pounds or more per square inch.Vehicles have one fuel injector for each cylinder in the engine. Your vehicle's control computer constantly monitors the engine and various sensors in the vehicle.  It ... read more

There are a surprising number of small, inexpensive parts that can lead to expensive engine damage when they fail. It doesn't seem right.Fortunately a lot of those things can be taken care of in routine maintenance. They may not be easy to remember because it is a long list, but your service center at Allen's Automotive Center can help you know what's scheduled to be taken care of.Some of us in Memphis, Tennessee, really don't look forward to going in for an oil change and then getting a list of the other things the manufacturer recommends.But automotive maintenance is all about prevention and addressing small problems before they get big. Let's take the fuel filter for example.You may not know this but the median age for private vehicles on our Memphis, Tennessee, roads is over nine years. When vehicles get older, five years or so, they've accumulated a lot of dirt and rust in their gas tanks. If that dirt gets into the engine it can cause t ... read more