AUTONET TV

Exhaust Service at TJ's Auto Center Inc.: Passing the Smell Test

The exhaust system on a vehicle is more complex than most Rockford residents realize. It contains everything from old-fashioned pipes and clamps to sophisticated computers and sensors. All Illinois folks know a properly functioning exhaust system is good for the environment, but sometimes we forget that a damaged exhaust system can be deadly. That's why preventive maintenance on your exhaust system is so important. We can help you with that at TJ's Auto Center Inc. in Rockford.

The exhaust manifold is the first component in your exhaust system. The manifold is attached to the engine. It collects the gases that are produced by the engine and directs them into the exhaust pipes. At this point, these gases are both hot and chemically dangerous.

One of the gases produced in your engine is carbon monoxide. This gas is colorless and odorless. Breathing it can cause headaches, dizziness, nausea and drowsiness. Continue breathing it and you will die.

To keep this gas and others from entering your vehicle passenger compartment, the connections from the manifold to the engine and from the manifold to the exhaust pipes are sealed with gaskets. These connections should be routinely inspected at TJ's Auto Center Inc. for cracks and to check if they have come loose.

The exhaust pipes can also get damaged, allowing dangerous gases to leak into your passenger compartment. These pipes can rust or be dented or broken by rocks and other roadway debris, so they need to be inspected regularly.

The catalytic converter is the next component in your vehicle exhaust system. You can breathe a sigh of relief now, because this is where the dangerous engine gases are converted into carbon dioxide and water, greatly reducing the amount of harmful emissions in your exhaust. You'll also be happy to know that your catalytic converter doesn't require maintenance. However, it will wear out. If you fail an emissions inspection because of a faulty catalytic converter, you need to replace it.

The muffler's job is far less critical, but far more noticeable, than the catalytic converter's. It dampens or absorbs the noise from the engine. Most Rockford residents don't realize that we can actually customize the noise our car makes with a custom muffler. You can upgrade to a muffler that will make your car sleuth-quiet, or you can advertise your presence in Rockford with a sassy rumble.

Mufflers can also rust or be damaged by road debris. But just because their main function is to dampen out engine noise doesn't mean they can be ignored. If your muffler is leaking, you need to get it replaced quickly. Exhaust fumes need to exit through your tailpipe, not your muffler.

The exhaust pipe contains at least one oxygen sensor. The sensor monitors the oxygen content of the exhaust, which allows it to adjust the fuel-to-air ratio in the engine. This keeps your vehicle engine running smoothly and maintains good fuel economy. So, besides keeping you and the environment healthy, a well-maintained exhaust system also keeps your vehicle healthy. The tailpipe itself can rust or get damaged by road debris, so it needs a quick inspection once in a while, too.

The whole exhaust system is mounted on the vehicle with clamps and hangers. These clamps and hangers can come loose, rust or get dinged up by road debris. Remember that the gases in your exhaust system are hot, so the exhaust system itself gets hot. The clamps and hangers keep the exhaust system attached to the vehicle, but they also prevent the heated components from touching things they shouldn't. If you don't inspect and replace broken, loose or damaged clamps, you may end up with melted wires, hoses or lines. And that can spell some expensive repairs.

You should schedule an exhaust system inspection as recommended in your vehicle owner's manual. Because this system is critical to your health and the health of your car, and because of its sophistication and complexity, you need to have the work done at a qualified service center such as TJ's Auto Center Inc. in Rockford.

Maintaining your emissions and exhaust system is not just good auto advice: it's good health advice for all Rockford residents and their families.

TJ's Auto Center Inc.
3427 E. State St.
Rockford, Illinois 61108
815-399-2886

Check Engine Light Diagnosis at TJ's Auto Center Inc.

Hello Rockford . Have you ever had your Check Engine light come on? Did you panic? Or just scowl and ignore it? What should you do? Pull to the side of the road and call a tow truck? Or just keep driving? What does that little light really mean for Rockford drivers?

First of all, the Check Engine or Service Engine light does indicate that something is wrong. That's why it is called a warning light. But the something that is wrong might be a loose gas cap, or it might be serious vehicle engine trouble. That's why Rockford residents often don't know how to respond to it.

The Check Engine light has two modes: it flashes or it stays on. A flashing light is serious. You need to get your vehicle to TJ's Auto Center Inc. in Rockford ASAP. No, you don't need to call a tow truck, but, yes, you can't wait to get your car serviced. If your Check Engine light is on and flashing, you should not tow trailers, haul heavy loads or drive at Illinois freeway speeds. Any of these could lead to serious damage that could result in repair bills for Rockford drivers who ignore it.

A steady Check Engine light is less serious, but that doesn't mean it can be ignored. You should plan to get your vehicle inspected at your local Rockford automotive service center at the first realistic opportunity. Not the first convenient opportunity, but the first realistic one.

Modern automobiles have a computer in the engine that monitors and controls many of the engine functions. When the computer senses something wrong, it first tries to fix the problem itself by adjusting the vehicle engine. If the problem persists, the computer signals the Check Engine light to come on.

This process stores a trouble code inside the vehicle engine's computer. Your service advisor at TJ's Auto Center Inc. scans the computer and reads the code. This does not tell the technician exactly what is wrong with the car, but it gives him a good idea as to where to start looking.

Of course, the best thing to do is to keep that pesky Check Engine light from coming on in the first place. Good vehicle care and routine preventive maintenance go a long way to keeping your vehicle out of your Rockford auto repair shop. But, if that light does come on, be smart. Take care of the problem early, and take care of it professionally.

TJ's Auto Center Inc.
3427 E. State St.
Rockford, Illinois 61108
815-399-2886

Straight and True in Rockford: Wheel Alignment

Most Rockford folks worry about running out of gas or having a breakdown on the side of the road. That is why we practice preventive maintenance on our vehicles — that and to keep our repair bills down. But one important part of preventive maintenance that may get overlooked by drivers in Rockford is a periodic alignment inspection.

Poor alignment causes tires to wear rapidly, unevenly or both. This means they will have to be replaced early, and new tires are more expensive than an alignment check in Rockford. Bad alignment can also cause damage to suspension and steering systems, which can be expensive to repair in Rockford.

Tire wear on misaligned wheels can also lead to blowouts, which are dangerous, can lead to serious accidents and can seriously damage your vehicle. Also, poor alignment itself can be the cause of an accident since the vehicle may not steer properly.

One or more wheels on your vehicle can be knocked out of alignment by running over a curb or a pothole on a bumpy Rockford street. An accident —  even a minor one — that involves a wheel on your car can lead to misalignment. The small bumps and bangs of everyday driving can also gradually put your wheels out of alignment.

If you have had wheel damage to your vehicle, or if you suspect that your wheels are out of alignment, you should get your alignment checked NOW. Any service center will give you that piece of auto advice. But good vehicle care suggests that you also get your alignment inspected on a regular basis. At TJ's Auto Center Inc. in Rockford, we can take care of that for you.

Your owner's manual or TJ's Auto Center Inc. can give you a suggestion on how often your alignment should be checked. If it doesn't, then once a year is a good rule of thumb. However, if you drive a lot — and especially if you drive on rough surfaces a lot — then you may want to consider alignment more often. Ask the pros at TJ's Auto Center Inc. for a recommendation.

If your vehicle is out of alignment, one or more of the wheels is not tracking correctly and will “pull” against the others. Thus, one sign of poor alignment is that your vehicle pulls to one side when you drive around Rockford. Also, if you are driving a straight path and your steering wheel is off-center, that usually indicates an alignment problem.

Rockford drivers should also check the wear on their tires. If they seem to be wearing out too quickly, or if you notice that a tire is wearing on one side more than the other, you should get your alignment checked.

When you get an alignment inspection, your vehicle will be put on a rack and all the parts of the steering and suspension systems will be inspected for wear or damage. The alignment of the tires will be charted and compared to the original factory settings. If no repairs are needed on the steering or suspension systems, the wheels will then be adjusted to bring them back into alignment.

This may seem like a lot of bother for drivers, but it's a lot less trouble than a blowout or an accident. The old adage is good auto advice for all Rockford residents: an ounce of prevention is worth a pound of cure.

So keep on driving, and keep all four tires on the road.

TJ's Auto Center Inc.
3427 E. State St.
Rockford, Illinois 61108
815-399-2886

Drive Train Service in Rockford at TJ's Auto Center Inc.

The drive train in your vehicle includes all the components that transfer power from the transmission to the wheels. Those components differ depending on what type of vehicle you drive, namely, front-wheel drive, rear-wheel drive, all-wheel drive or four-wheel drive. The preventive maintenance your driveshaft needs will also differ by what type of vehicle you drive.

Let's start with front-wheel drive. In this vehicle, the transmission and the differential are combined in one component, known as the transaxle. The transaxle is connected to two half-shafts (axles), which are then connected to the wheels with a constant velocity (or CV) joint, which is protected by an airtight rubber boot.

TJ's Auto Center Inc. service for this type of driveline includes servicing the transaxle and inspecting the CV boot. If the boot is damaged, the CV joint will need to be inspected, and the boot will need to be replaced. If you hear a clicking noise in your wheel wells when you turn, you may have a damaged CV joint. A damaged CV joint should be replaced.

Rear-wheel drive vehicles generally have a transmission in the front of the car and the differential in the back. A driveshaft (it looks like a long tube) connects the transmission to the differential. Some vehicles may have a two-piece driveshaft, which are connected to the differential with universal joints or U-joints. Again, the differential is connected to two half-shafts that go out to the wheels.

TJ's Auto Center Inc. service on the drive train on a rear-wheel drive vehicle starts with servicing the differential. It will need its fluid drained and replaced regularly. The seals on the axles should also be inspected for wear or leaks. Leaking or damaged seals may mean the axle needs to be serviced as well. Also, U-joints can wear out. If you hear clunking or feel a jolt when you shift into drive or into reverse, it could indicate a driveline problem.

All-wheel drive vehicles provide power from the transmission to all of the wheels, instead of just to the front or rear. The advantage is that the vehicle can adapt to different driving conditions and transfer more power to the front or back wheels as needed. The disadvantages are that the driveline is more complicated, and the vehicle weighs slightly more.

Many all-wheel drive vehicles are based on a front-wheel drive set-up. They also have a differential in the rear and one in the center of the vehicle that allows power to transfer to the front and rear. A shaft runs from the transfer case to the center differential, and another from the center differential to the rear differential.

Servicing an all-wheel drive at TJ's Auto Center Inc. involves servicing ALL of the differentials and inspecting the joints and seals for wear, leaks or damage.

Four-wheel drive vehicles are rear-wheel drive vehicles that have an option to transfer power to the front wheels. In other words, they can be driven as either rear-wheel or four-wheel drive vehicles. These vehicles are specifically designed for the harsh driving conditions Rockford drivers encounter off-road. The driveline in a four-wheel drive vehicle is similar to that of an all-wheel drive vehicle. The center differential, however, is a transfer case. Maintenance requires servicing both of the differentials and the transfer case, as well as an inspection of the joints and seals.

Rockford auto owners would be wise to check with their owner's manual for recommendations on how often to service their vehicle drive train. It's also good auto advice to check with your friendly and knowledgeable TJ's Auto Center Inc. service advisor as well. You may live in an area in Illinois where weather or driving conditions require more frequent servicing of the drive train.


Good car care at TJ's Auto Center Inc. in Rockford always includes taking care of your driveline. Without it, your vehicle becomes a very large paperweight.

TJ's Auto Center Inc.
3427 E. State St.
Rockford, Illinois 61108
815-399-2886