A Clean Sweep (Fuel Injector Cleaning)

Your vehicle gets its power from burning fuel, usually gasoline, and it counts on something called fuel injectors to send gas to the engine in a spray that is easy to ignite.  It’s a precise operation, and when it’s working well, you have plenty of power and an efficient engine.

But after time, contaminants in the fuel system may prevent the injectors from spraying like they’re supposed to.  They can also shoot contaminants into the engine. 

One sign that could point to dirty fuel injectors is a misfiring engine. Misfires can be caused by several things, so it’s a good idea to bring your vehicle to us so we can trace the cause. Another sign is that your fuel economy has gone downhill or your engine doesn’t have the “pep” it used to.

If we discover that your injectors are clogged or not working the way they should, we can clean them to get rid of those contaminants to restore your engine to its top performance.  When you bring your vehicle to us, we will connect the flushing equipment, flush out the injectors and reassemble the system.

A good time to have fuel injectors inspected is when you bring your vehicle in for routine maintenance.  An oil change is an ideal time to have a technician take a close look at your entire fuel delivery system. 

When you have your fuel injectors cleaned, you may see your mileage go up, your engine performance improve, and your exhaust emissions decrease.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

Don't be Fuelish (Signs Fuel Pump is Failing)

A driver of a large SUV loaded with equipment was heading on a 7-hour work trip when he stopped at a gas station to refuel.  When he went to restart his SUV, it turned over but wouldn't catch.  Try as he might, he was never able to get it started again. 

Of course there are many things that can cause those symptoms, but the next day he had his SUV towed to a service repair facility.  Using their test equipment, they were able to pinpoint the problem.  His fuel pump had failed.  The pump, which was located in the fuel tank, had to be replaced, and after awhile he was back on the road, delayed, but happy to be up and running again. 

What had happened is that the pump was not strong enough to deliver adequate  fuel to his engine, vital to being able to start it.  It had delivered just enough pressure in the morning to get it started the first time, but it was on its last legs.  He had been having trouble starting his SUV in the days leading up to this trip, a clue that something was wrong. 

The engine relies on a certain pressure of fuel from the pump to run properly, and there are some other signs to be aware of that your fuel pump may need to be replaced.  If you are putting strain on your engine, such as going uphill or hauling a big load, and the engine sputters, it may be a sign that the pump isn't delivering that consistent pressure.  Another warning sign is if your engine is running hot and then stalls.  That could mean your fuel pump is getting weak.

Sometimes you might notice your vehicle suddenly speeds up on its own or your fuel economy goes from good to poor in a short time.  If your fuel gauge shows you have plenty of fuel in the tank and your engine stalls, that's another possible sign of a failing fuel pump. 

Technicians have special equipment to see where the fuel problems are, and there are many possibilities.  Have your vehicle checked before you're left stranded.  Oh, and one more tip to prolong the life of your fuel pump.  Since it is cooled and lubricated by the fuel in your tank, make sure you keep at least a quarter of a tank of fuel at all times.  Avoid your "low fuel" light going on and you may be helping yourself avoid having to replace your fuel pump. 

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

A Door No One Can Step Through (Fuel Door Repair and Maintenance)

Your vehicle has lots of doors including that one usually near the back on the vehicle's side.  That's the fuel door, something you use every time you gas up.  These endure hundreds of open-and-close cycles, usually without any problems.  But when they act up, it can be a major inconvenience for you.

When they stick in the "open" position, it can present real dilemma.  You can still pump your gas, but do you just drive around with that flap sticking out the side? What happens if someone steals the gas cap or it gets damaged? What happens if it rains? Yep, it's decision time.

A fuel door that sticks open can be due to a number of factors.  The hinge on the door may have broken, possibly from corrosion or it may have been hit sometime.  Some vehicles have a cable that operates the door and it could be loose.  The latch that holds the door shut could have broken or it, too, could be bent from something hitting it. 

You probably want to take care of this sometime soon since your gas cap is wide open and unprotected when the door doesn't shut.  Plus, it's possible that the door could be torn off completely.  Often a stuck open fuel door can be fixed fairly inexpensively and quickly depending on the type of mechanism your vehicle has. Looks like it's an open and shut case.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

The Car Doctor Guide to Saving Fuel: Beware of Myths

There's a lot of auto advice in Oklahoma 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. Oklahoma City drivers can usually find out in only minutes whether that claim is questionable or not.

Chances are other Oklahoma City 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 bunch more sediment or unknown, dissolved additives in your fuel.

There actually are proven, sensible ways that you can maintain good gas mileage, however. Good car care and consistent preventive maintenance are the keys to good fuel economy. An oil change at Car Doctor in Oklahoma City and a new fuel filter, when needed, will keep your engine running efficiently, which will translate to good fuel economy. It may be mundane, but it's solid, proven advice.

So be smart. Listen to advice from qualified Car Doctor professionals, and stay away from unverified “magic” and conspiracy theories. Your wallet—and your vehicle—will thank you in the end.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

How to Get Better Gas Mileage in Oklahoma City

There is no escaping it: things work better when you take care of them. Something most of us in Oklahoma City can relate to is our computers. You've probably noticed how they get slower and slower over time. It takes longer to start up and programs take forever to load. Eventually, many of us just get a new computer at our nearest Oklahoma City computer store. But computer experts know that there are things you can do to delay the need for a new computer purchase. You can run utilities that clean off temporary files and clean your memory registry. You can optimize your hard drive and a number of other things.

What you're doing is maintaining your computer to make it efficient. It's the same thing with your vehicle. You maintain it to make it more efficient. It works the way it was designed to and that means it uses less fuel while you drive around Oklahoma City. And you save money.

To help organize our discussion, let's think of things that rob us of fuel economy in two ways: increased friction and inefficient fuel combustion.

Friction. Anything that increases friction increases drag or load on the vehicle engine. It has to work harder to overcome the drag – and that takes more fuel. The first thing that comes to mind is engine oil. Low oil means there's not enough to fully lubricate the engine so there's more friction. Dirty oil won't lubricate as well as clean oil. The same principles apply to transmission fluid. Getting your oil changed and transmission serviced on schedule at Car Doctor will reduce friction and help you get better fuel economy.

Another friction related problem is underinflated tires. When your vehicle tires are low on air, it's like driving on Oklahoma highways through sand – your vehicle has to work harder to move every mile. Check your tire pressure at least once a month.

Wheels out of alignment and dragging brakes also increase friction. And your tires and brake pads will wear out much sooner as well. At Car Doctor, we provide quality brake and wheel alignment services.

Let's move on to Fuel. You have to get the right amount of clean fuel to the combustion chamber at precisely the right time. A dirty fuel system has varnish and gum interfering, and the fuel injectors may be unable to deliver the correct amount of fuel at the right pressure — and in the spray pattern — that the engineers intended. A vehicle fuel system cleaning at Car Doctor will get all of that working right and really improve fuel economy.

Replacing your fuel filter on schedule will help keep your fuel clean. Replacing a sticky PCV valve will allow unburned fuel from the engine to be returned to the intake system to be used. Replacing worn spark plugs will burn your fuel as efficiently as possible.

All of these things can help you save money on gas at Oklahoma City pumps.

Give us a call.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

Fuel Injection Basics for Oklahoma City

All modern Oklahoma City vehicles come with fuel injection systems, so it's a topic Oklahoma City drivers need to know something about. The mighty fuel injector is a valve that delivers the gas or diesel fuel to the right place, in the right amount at the right time—to be mixed with air and burned in the engine.

So how many fuel injectors does your vehicle have? There's one for each cylinder. So four, six or eight for most folks in Oklahoma City, Oklahoma. Some vehicles have 10 or 12 cylinders. The engine control computer makes adjustments to the fuel injector as it monitors the engine and other sensors. Fuel injectors are a pretty high-tech.

Car Doctor can help Oklahoma City drivers with a fuel injector cleaning service. What's the benefit? In order to work right, the fuel injectors have to deliver the fuel at a precise pressure at a very precise time. It's important that the fuel is sprayed in a particular pattern as determined by the engine design.

Over time, varnish can start to build up in the fuel injectors, effecting the pressure, pattern and timing of the fuel charge. The result is that the fuel doesn't get burned as efficiently as it could. That robs performance and hurts fuel economy.

What about dirty fuel? How does that affect the fuel injectors? The fuel injectors are the last stop in the fuel system. It starts at the fuel tank. Frankly, the best way to keep your fuel injectors working well is to use high quality fuel. It's tempting to shop for bargains in Oklahoma City with fuel prices as high as they are, but major brands in the Oklahoma City, Oklahoma, area have better detergents and additives and deliver consistent quality.

What about a good fuel filter? The fuel filter is component of the fuel system. Its job is to filter out the dirt and rust that collect in the fuel tank. If it's clogged up, the dirt will bypass the filter and head upstream to the fuel injectors.

It's important to replace the fuel filter when your manufacturer recommends it. That's part of a comprehensive fuel system cleaning.

There are different kinds of fuel injection systems. Port fuel injection systems, the kind most gasoline engines have, operate at 60 pounds per square inch. The injectors for the new gas direct injection engines Oklahoma City drivers are starting to see require 10 to 30 times as much pressure. And some diesel engines for passenger vehicles have injectors that operate at 30,000 pounds or more per square inch. There's no room for dirt and gum in a precision part like that.

There are a lot of good products available in Oklahoma City, Oklahoma, that can clean fuel injectors. They're best used to prevent fouling in the fuel injectors. Many can't clean a seriously gummed up injector – that requires a professional deep cleaning, like those we offer at Car Doctor in Oklahoma City. But putting the cleaner in the fuel tank after you've had Car Doctor take a look at your fuel system will help keep it clean. Be sure to read the label for directions.

Give us a call if you think your vehicle may be ready for a fuel injector cleaning.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

Fuel System Cleaning at Car Doctor

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 Oklahoma City 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 Oklahoma City 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 Car Doctor. Car Doctor has the professional tools and chemicals to really do a complete service.

Car Doctor uses a process that gives your vehicle a deep, professional fuel system cleaning. You need to remove particles, gum and varnish from your fuel system and get those injectors running cleanly and efficiently. After a professional fuel system cleaning, you'll notice more power, better fuel economy and reduced exhaust emissions.

The cleaners also help prevent rust and corrosion in your fuel system and lubricate engine parts.

Fuel system cleaning is just one of those recommended service items that help keep your vehicle running strong. As with all maintenance, it can help avoid repairs that often result from not taking the right preventive steps. Oklahoma City residents will notice the difference in how well their vehicle runs. Check with your friendly and knowledgeable pros at Car Doctor to see when your vehicle is scheduled for a fuel system cleaning.

An ounce of prevention really is worth a pound of cure for Oklahoma City vehicles.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

Introduction to Diesels for Oklahoma City, Oklahoma

Something you're going to be hearing a lot about around Oklahoma City, Oklahoma, is diesel engines. We're not talking about semi-trucks and buses; we're talking about diesel engine cars, pick-ups and SUVs.

Most people in Oklahoma are surprised to learn that around half the cars on the road in Europe have diesel engines. Nearly all import brands offer a range of diesel engines abroad – even the ultra-luxury brands like Mercedes and BMW. For the most part, these diesel engines haven't been available in Oklahoma City, Oklahoma. But that's about to change.

In the past, North American diesel fuel has had a much higher sulfur content than European fuel. Recent environmental laws have required changes in diesel formulation and emissions standards here in Oklahoma City, Oklahoma, so we are now ready to start seeing more diesel options offered over the next few years.

Why are so many Oklahoma City drivers interested in diesel engines? Well first off, diesel fuel is more energy dense. There's more power in a barrel of diesel fuel than there is in a barrel of gasoline. The result? Better performance and improved fuel economy.

Diesel powered vehicles get about 20 percent better fuel economy. And as for power – why do you think that the majority of new heavy duty pick-up trucks are being sold in Oklahoma City with diesel engines?

If you think back to the late 1970's and early 1980's, you may shudder when you think of the diesel powered cars of the day – noisy, smoky, under-powered beasts that rattled and shook their passengers. Modern diesels sold in Oklahoma have evolved considerably.

They are quiet, clean – and powerful. They're so refined that many Oklahoma City drivers can't even tell they're riding in a diesel powered vehicle. In addition to fuel savings, diesels generally last longer than gasoline engines because of their heavy duty construction.

Another thing the Oklahoma City green crowd takes advantage of is the use of bio-diesel in diesel vehicles. Bio-diesel is made from vegetable oil – even recycled cooking oil from Oklahoma City restaurants. There is a lot of buzz about hybrid cars in Oklahoma. Look to diesel-electric hybrids in years to come to make a good idea even better.

Every year, manufacturers introduce new diesel models. Look for diesels in domestic light trucks, SUVs and passenger cars. Import brands have plans to bring more of their outstanding diesel engines to Oklahoma as well.

New Oklahoma City diesel owners need to know that properly maintaining a diesel engine is somewhat different than a gasoline engine. Fluid change intervals are different. Emissions control devices have to work harder to filter diesel fuel and to scrub the exhaust so you will need to pay attention to that. And the fuel injection system operates at much higher pressures than gas fuel injection systems, so it's important to keep your fuel system clean with a diesel.

The good news is that Car Doctor in Oklahoma City is keeping up with the new diesel technology and will be able to advise you on maintaining your diesel.

When we tell you to look for more diesels on Oklahoma City streets, you won't be looking for smoky tail pipes as a clue. You also won't be listening for that familiar big rig rattle. And, you certainly won't be waiting for them at the stoplight, because modern diesels are as quick as their gasoline counterparts.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

Fuel Filter Replacement

Hello Oklahoma City resident! You would never like to drink a glass of mud, right? Well, your vehicle feels the same way. It needs a steady supply of clean fuel in order to run well and deliver good fuel economy. The fuel filter's job is to clean dirt and rust out of the fuel before it gets to your engine. A clogged fuel filter can actually choke off the engine so that it won't start or run. Some fuel filters have a bypass valve that allows fuel to go around the clogged filter so your vehicle will still run. But, then the contaminated fuel can clog your fuel injectors and allow particles into your engine.

A vehicle with a partially clogged fuel filter might run well around Oklahoma City, but sputter and strain on the because it's starving for gas. There are two things that affect how often you need to replace the filter. They are: where you drive in Oklahoma and the gas you buy. If you drive a lot on dirt or gravel roads in rural Oklahoma, your fuel filter will have a harder time keeping the fuel clean.

And, we hate to say it, but buying the cheapest gas from bargain stations sometimes means dirtier fuel that'll clog the filter sooner. Major brands tend to be cleaner and certainly have higher levels of detergent additives.

Of course, manufacturers recommend intervals for changing the fuel filter. But, it's a little more complicated than that for Oklahoma City residents. Some manufacturers stopped listing recommended intervals for fuel filter replacement or have very long intervals like every five years or 80,000 miles (130,000 kilometers). So you may need to look to other sources for recommendations. Vehicles older than six or seven years are especially at risk because they have had time for dirt and rust to build up in the fuel tank. A clean fuel filter keeps the gas flowing. Even a partially clogged filter puts added strain on the vehicle fuel pump. That can shorten its life and result in repair.

As is often the case, spending a little money now on something as inexpensive as a fuel filter can save money for Oklahoma City residents down the road by improving and preventing repairs. At Car Doctor in Oklahoma City, we can check your fuel filter. It is better than fixing a burned-out vehicle fuel pump or ruined fuel injectors.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net

Don't Be Fuelish

If you smell gasoline in your vehicle, pay attention to your nose. That's because it has an important message for you.

Newer vehicles should never have a gasoline smell inside. One of the most dangerous conditions can come when your fuel line system has a leak or multiple leaks. Vehicles with fuel injectors are under pressure, meaning a crack or small hole in a fuel line can allow vaporized fuel to escape, sometimes around hot engine parts. Gasoline vapor and hot metal? You see the problem.

One of the most common causes of a gasoline smell inside a vehicle is a fuel tank leak. The gas tank can rot or be punctured by road debris. A Car Doctor technician can evaluate the condition of your fuel tank and suggest either repair or replacement.

Fuel injectors can develop small leaks around their seals or O-rings. Those can deteriorate over time as the material they are made of gets old and less flexible. A technician can replace those parts.

Modern vehicles contain something called a charcoal canister. It gathers evaporating gasoline vapors from inside your fuel tank and prevents them from venting out to the atmosphere. If that canister has a leak, you'll smell it. One hint that you have a problem is the Check Engine light may come on.

You may have a leak in your fuel tank vent hose. Or you may be smelling gasoline simply because your gas cap is loose, the cap is faulty or—yes this does happen—your gas cap is missing altogether.

Consider the dangers of gasoline fumes seriously. Inhaling them can be bad for your health or they may start a fire. Don't fool with fuel; have gasoline odors checked out right away.

Car Doctor
1217 N.W. 5th St
Oklahoma City, Oklahoma 73106
405-232-1949
http://mdcar.net