Thom's Four Wheel Drive

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

Have you ever thought about all the little things we do to keep our lives running smoothly - like vacuuming? It makes a room feel fresher and more comfortable. We may not consider that we're also prolonging the life of the carpet by keeping it clean. But CHICAGO drivers don't always extend those good habits into the garage. Our vehicles need regular maintenance just like our rugs need vacuuming. We may not notice a difference in the feel or appearance of the vehicle, but just as cleaning a carpet carries the hidden reward of prolonging its life, maintaining our vehicles incurs a hidden reward that becomes noticeable at CHICAGO gas stations.When it comes to reduced fuel economy, there are two culprits: increased friction and inefficient fuel combustion. That means that anything CHICAGO drivers can do to decrease friction and increase the efficiency of their engines will translate to savings on fuel. Friction increases the amount of energy it takes to move something. So if we can reduce ... read more

Your car might have an alignment problem if: it drifts or pulls to one side, your steering wheel is off center, you have uneven tire wear or your car doesn't feel like it handles right. When all of a vehicle's wheels are lined up exactly with each other, your wheels are in alignment. Running into potholes around CHICAGO and smacking a curb or other object are great ways to knock your car out of alignment. Then, one or more of your wheels starts pulling in a slightly different direction and the problems begin.There are several things involved in an alignment check at Thom's Four Wheel Drive. First, there's an inspection of the steering and suspension systems - their components should be checked to see if anything's bent or broken. Then the tire condition needs to be inspected. From there, the vehicle is put on an alignment rack and an initial alignment reading is taken. If all four wheels are adjustable, they are lined up perfectly parallel with the vehicle's center line. If t ... read more

So your vehicle won't start.  What's the first thing that comes to mind?  Battery dead? Starter motor worn out? Out of gas?  Well, those are all reasons that make sense.  But your vehicle may be refusing to start because one of its computers is being warned that to do so might damage it.  Here's how that works. You have lots of computers in your vehicle.  They need to know the status of things so there are several sensors monitoring various things going on.  These sensors send information to the computers that adjust the fuel and air mixture so you don't waste fuel.  They know when things aren't quite right and prevent you from starting your engine if that's going to damage it.  Other sensors make sure the coolant is the right temperature, check to see you are not polluting the air and make sure other electronic components are performing their tasks correctly. Here's an example of a sensor doing its job.  Your engine needs oil to lubric ... read more

You may have noticed sometimes on a hot and humid day, vapor will come out of your vehicle's vents when you have the air conditioning on.  Is that something to be concerned about? Well, it depends. Sometimes that steam or vapor can be caused by water accumulating in the vent system after it has condensed.  And sometimes water can pool at the bottom of a vent.  When you turn on the blower mower, the air hits the water and may create steam or vapor that you can see in the cabin. One thing to check is if that vapor smells like anything.  If it doesn't, that's a good sign. You may be able to run the fan for a while and the issue may just go away when things dry out.  But moisture collecting in the ventilation hoses in a hot vehicle may be a breeding ground for mold, and that can have health consequences. There's another possibility. Ventilation systems often have drains to get rid of any accumulated water, and debris can sometimes clog them.  A technician can ... read more

Screeching tires, crunching metal – it's an accident! If you've ever been in a car accident in CHICAGO, even a minor one, you know how upsetting it can be. It's hard to think straight and know what to do.Let's review what CHICAGO drivers should do in case of an accident:When an accident occurs, you should always stop. Leaving the scene of an accident in CHICAGO is considered a crime - even if it's not your fault. And hit and run penalties are fairly severe, possibly resulting in steep fines, loss of your Illinois driver's license or even jail time.Your jurisdiction may require that you try to help someone who is injured by calling for help or performing first aid if you are able. Warn other motorists by putting out flares, using your flashers or lifting your hood. Call CHICAGO emergency services as soon as possible. Tell the operator if medical or fire help is needed.You should always file a police report. It's tempting to skip this if everything seems to b ... read more

The brake rotor, or disc, is attached to your wheel. The brake pads rub on the rotor to slow your car when you are driving in CHICAGO.Rotors can warp, crack or become misaligned. They can also be damaged by worn out brake pads that scratch grooves into the surface. These conditions result in less contact surface for the brake pads, leaving you with reduced braking power.Over time and miles, rotors can also wear down below safe specifications. It is important for CHICAGO drivers to know that simply replacing brake pads on a wheel with a bad rotor will not solve the problem. Depending on their condition, rotors may be resurfaced or replaced.Brake noise or a pulsation in the brake pedal are signs of potential brake problems that should be addressed right away. If you have any brake concerns, please have your friendly and professional Thom's Four Wheel Drive tech perform a thorough inspection.Give us a call.Thom's Four Wheel Drive4118 N PULASKI RDCHICAGO, Illinois 60641 ... read more

There are some dashboard lights you should pay more attention to than others.  One is the air bag light.  If it's on and your vehicle is in an accident, your air bags probably won't do their job. Automakers began installing air bags in the late 1990's since they were mandatory in the United States, and manufacturers have included them in Canadian vehicles as well.  Safety experts say using a seat belt in combination with an air bag gives passengers the best chance of surviving a crash and minimizing serious injury. The air bag warning light takes a few different forms.  Some look like a picture of a belted passenger with an inflated air bag from a side view.  Or there may be a warning light that says something like "Air Bag," "SRS" (for supplemental restraint system), "Airbag Deactivated" or "Air Bag Off." Different things cause the air bag light to come on.  Your vehicle may have been in an accident during which, while the air bags didn't inflate, crash s ... read more

Safety should always be an element of your vehicle care. So even if you don't care about how your vehicle looks, you should practice preventive maintenance to protect yourself — and other CHICAGO drivers — on the road. And good safety starts with good brakes.Brakes need a regular inspection. There are  parts that wear out or wear down, and it's best to replace them before you have serious problems. Of course, if you are having trouble with your brakes, NOW is the time to fix them. If your brake warning light is on, that's a good sign that you need your brakes checked. You can also tell something is wrong with your brakes by the feel of the pedal or unusual sounds while braking. If the brake pedal is low, feels spongy when you press it or is hard to push, that indicates a problem with your brakes. If you hear squealing, grinding or clunking noises when you brake, that can also indicate serious problems. If vibrations accompany ... read more

One might say the most challenging part of being an automotive service technician at Thom's Four Wheel Drive is diagnosing a problem before it can be fixed.Cars are made up of a bunch of complex systems. There usually could be a number of reasons for any given symptom. So, it's challenging to track down the actual cause of the problem. And it can be frustrating for the vehicle owner because it can take time and money to get to the bottom of a problem. If it's not something obvious, it's easy for the customer to focus on the fixing and not the diagnosing.Let us at Thom's Four Wheel Drive introduce you to something we'll call 'Customer Detective Work' –  helping your technician find clues to what's wrong.We start with the detective basics: What, Where and When. Play along with me; You come in to Thom's Four Wheel Drive and your car is making a funny sound... Q: Where's the sound? A: Around the right front wheel. Q: What kind of sound? A: Kind of a clunk ... read more