Why Won’t My Navigation Unit Work

There are tons of new kinds of nav systems for late model cars, from Mercedes to Honda they are as varied as the cars they are in. The car navigation system over the years has become more and more advanced, for instance the Mercedes systems all use optical wiring that won’t work in any other car or system. Most of the new car radio and nav systems have specific software requirements for the systems to work correctly. If you are trying to install a factory in dash navigation screen into a car that did not come with it you may run into some issues.

The Nav unit will not take the information correctly and therefore cannot work properly if the software in the unit you are installing is not built and programed for your application. To be sure that any unit that you are planning on installing in your ride will fit, get the OEM number from the dealership. The OEM number is an exact number for the unit that will hook up in your vehicle without any reprogramming or modification to the unit.

Most in-dash nav units nowadays are part of a system and not just the stand-alone unit that can be seen in the dash they also have a under seat or trunk unit as well. If a new or old nav unit is not working it may not always be the part you think or the reason you think. If any of the parts in the system fail it will make the head unit not work. In the case of Mercedes the units are all calibrated to work in the original car and cannot be swapped into any other car. If you are having issues with your cars navigation system be sure you narrow down the issue before you start spending your hard earned cash. 

How to Stop the Moaning and Groaning from Your Steering System

On a short 15 min commute to work you may see between 500 and 10,000 other cars on the road. A staggering number of these cars you have just seen are driving around with warning lights on the dash.  These warning lights may be for the any system from the O2 sensor or air fuel ratio sensor to the gas cap being too loose, but what about your car? What is that sound from the steering when you are at slow speeds?

Most of us know that even if a car is not flashing a warning light it can still be having an issue. A moaning from the car at slow speed cornering is a sound that should not be ignored. This sounds is usually a sign of an issue with the steering pump, most likely the sound is being caused by air in the steering system. What happens is the air in the system will pass through the steering pump and cause there to be less resistance on the pump which in turn means it cannot function correctly. The groaning sound is actually the pump struggling to create enough pressure to keep up with the demand being put on the steering system. Some people may just ignore that sound and keep driving but this is a bad idea. These sounds are a symptom of failure but the system can be saved if caught early enough.

The power steering system is set up so that the fluid pumped through the lines will press the steering piston the correct direction needs to maneuver the car as desired. If this system is not working in proper order steering will become very difficult. To get the air out of the system takes a little more effort than just pouring in more fluid. The system will need to be “bled”, to do this you will need to follow a few easy steps. First jack up the front of the car and with the reservoir open and the car off but the key turned to accessory begin to rotate the steering wheel. As steering wheel is rotated bubbles will begin to surface from the system and you will need to add fluid accordingly. Rotate the steering wheel about 30 times left to right once this process is done, replace the cap on the reservoir and lower the car.

With the air out of the system the moaning should have stopped, if not the problem is the pump itself. In the case that it is a bad pump, it will need to be replaced but this process can save a pump if it is just low on fluid. A steering system that is low on fluid gets that way through a leak in the system, the next step is to determine where the system is losing fluid. General upkeep and basic maintenance is the best way to keep your car on the road for years to come.

How To Make Sense of AC Pressure Readings

Auto AC systems are extremely difficult to understand, the system not be blowing cold air but most mechanics have no idea why.  Most mechanics will take a few minutes with the vehicle and say the old “the AC compressor is shot” buuuuut honestly they are just guessing. Usually changing the compressor it will fix the problem…but not for the reason you think. Not to mention it will cost a lot more than it needs too.  The reason that the AC works is, the replacement of the compressor also means that the mechanic changed all the other AC parts in the system. Also they refilled with the correct amount of Freon and oil which may have been wrong. With the whole system changed you are back enjoying your ac system, little do you know you just spent way too much money.

Air conditioning systems are very easy to diagnose if you know what to look for. The easiest way to diagnose an AC system is to get the pressure reading from the system with a pressure gauge. Issues like air in the system or too much refrigerant all have specific symptoms and can be diagnosed simply by using a pressure gauge.  Remember all the readings are set for an average day at around 75 degrees so reading may fluctuate a few psi depending on temperature.

Issue = readings and symptoms

Air Entered the AC system = both the high and low side pressure readings are high (low sire 35 – 43 psi, the high side is 284 – 355 psi) also the low pressure side will not be cool to the touch.

Too Much Refrigerant = same symptoms as air in the system but bubbles cannot be seen in the sight glass.

Expansion Valve Issues or Improper Heat Sensitizing tube installation = same symptoms as above but frost or dew on the low pressure piping.

Faulty Compressor = low side too high and high side to low.

Low Refrigerant = both high and low side readings are low.

Moisture Entered the System = low side pressure will be a vacuum.

Refrigerant Fails to Circulate = vacuum on the low side and low pressure on the high side.

If you follow these readings, the issues with your system can be worked out before the AC is opened up. In other words the mechanic can’t take you for a ride, you know more than he does. Being prepared is the best way to avoid spending more money than you have to. In an economy like the one we have today a little knowledge can be a valuable thing.

Why is a Working AC System so Important

Think back, when is the last time you can remember walking through a car lot and seeing a vehicle without air conditioning. To even have the option nowadays you will have to make a special request to the dealer. Why is it, that air conditioning is a standard on all cars? It doesn’t make sense in some areas if you think about it from a cooling point of view. AC compressor units are heavy and clutch will steal power from the car when engaged. Why oh why would you want AC if you are looking for a very cheap car?

Air conditioning is not only good for cooling a car but it has an ability to get moisture out of the air. AC is air conditioning not just air cooling…in other words it has many uses. It is used to defrost the windshield as well as clean the air in the car as well.

People tend to think that running the AC is a gas mileage killer but it may be just the opposite. Running The AC may pull a few horsepower from smaller engines but opening the windows is just like deploying a parachute on the back of your car. While the AC may lower the efficiency of the car by 1 or 2% the windows can hit you with as much as 10%.

AC has one last great effect that opening a window does not…it keeps you cool. Opening a window may cool you down for a second but all it is doing is turbocharging hot air into your face. Once your car stops moving all that warm air is just that…warm air. So come on people increase the efficiency of your car by running the AC for a change. Not only will you be comfortable but you will be saving money too.

How to Install a Fuel Pump Into a Level Sending Unit

Any car can fall prey to a failed fuel pump, from Bugatti to Fiat and no matter who you are it can leave you stranded. Many of the cars on the road today can be fixed without having to replace the entire fuel pump assembly in this situation. In some cars the fuel pump alone can be changed without changing the level sending unit.

The price of an individual fuel pump may be lower than replacing the whole assembly which is nice but the down side is the

labor. The fuel pump assembly is usually located inside the tank and will need to be pulled out to change the pump. The best option is to change out the entire assembly, spend the extra $20 since the labor savings will be much more than the cost difference.

Once the level sending unit is removed from the tank the swap process is very simple. Just detach the old pump from the electric and fuel line then slide the unit out. Now slide the new unit into the assembly and attach all the lines. Don’t forget to change the screen on the unit while it is apart. One thing to remember, there is fuel here…NO SMOKING!!!! This may sound like an obvious suggestion but hey you never know. With the unit installed in the assembly test the pump and make sure the pressure is correct. With everything working correctly, reassemble the car and you are good to go. Now it is time to enjoy what that Bugatti was meant to do…waste a ton of gas in a very fun way.

Why You Should Replace the Banjo Bolt on Your Subaru

There is nothing more surprising than having to change a turbo on your car, its expensive and time consuming. There are a few steps to remember when changing a turbo on Subaru, these cars are not like other turbocharger equipped cars. In some ways that is very true and it can cost you dearly.

The Subaru designers of the turbo system used what is called a “banjo bolt” which flows oil to the turbo unit. The banjo bolt is a bolt which has a hole through it and a screen in inside. As the oil travels through the bolt it passes through the screen and then enters the turbo. The reason you will need to change this part out is due to contamination of this screen. This banjo bolt really should be changed as often as the oil filter but is generally ignored, that is sad too. Just changing this 3$ part a few times could have saved a $1000 turbocharger.

Changing out the banjo bolt is easy and would take about 5 or 10 min while doing an oil change. Don’t forget to do this little maintenance because if the screen inside ends up clogged the oil cannot pass. When the oil does not make it to the turbo the unit will starve of oil and seize. This means that for the cost of a $3 bolt your car would still be running. We all want to find places to “cut costs” but this is one place where spending a few dollars extra is a great idea.

A Few Thoughts About a Leaking Turbo

There is nothing quite like your car puffing out clouds of smoke down the road. Not only is it embarrassing but it can also get you a citation from the cops, so what do you do? Well if your car is naturally aspirated or a supercharger equipped vehicle then you are in some serious trouble. You need to get the car to a mechanic right away. If you have a turbocharger in your car then it may be an easy fix that could lead to something very expensive.

When there is smoke pouring out of an exhaust it can be caused by a number if issues. The color of the smoke will help determine the issue that your car is facing. With oil smoke the key is to figure out why the car is smoking. Most mechanics will give the old “your turbo’s done gone” but that may not be the case, if you follow this advice it can cost you a lot more than money. A leaking turbo can be caused by the seals in the turbo being worn out or it can also be other more serious issues as well. For instance “blow by” in the engine can cause pressure in the oil system and force oil out of the turbo seals. Blow by is the term for when air escapes around the pistons and enters the bottom end of the motor. Blow by is a sign of a failing engine that needs to be addressed asap.

On some turbo cars if the intake is restricted due to pinched lines or a clogged filter the turbos will create a vacuum in the intake. This will actually draw oil out of the turbo through the seals and create smoke.

There are lots more reasons that can cause smoking or oil leaking from a turbo,  just remember to have the mechanic check the car thoroughly. Don’t just let him tell you “turbo’s broke” because you could be in for a world of hurt if you do.