Posted on 17, May, 2017
The “check engine” or “service engine soon” light is a very important part of your vehicle’s performance, dependability and capability for lowering emissions.
Early vehicles required a tune-up every 5,000 to 15,000 miles. But tuning a vehicle made in the last 20 years is just not done anymore. It’s a “past” term.
Tuning a vehicle used to be like being the conductor of an orchestra, making sure that each and every instrument was played at the correct instant, right volume and length of time -- timing being critical. In the tuning of engines, it was making sure that every cylinder was doing its part, and that the spark of each spark plug was delivered at precisely the correct time with the proper intensity.
Checking all this on a scope – firing times, voltage potential, fuel delivery -- was a very difficult job. Few knew how to do it thoroughly.
The modern vehicle is an incredible piece of equipment, and is the most advanced technology that people own. Millions of lines of code are written; very advanced control units make all the “tuning” choices quickly and accurately for all driving and temperature conditions.
Now here’s the good and great news with a little bad news.
Modern cars deliver great performance and good fuel mileage with very little maintenance. (Spark plugs every 105,000 miles vs. every 5,000 in older vehicles). Modern vehicles are even able to tell you when something is not correct. If the feedback to the control unit is out of parameters, that is when the “check engine” light comes on. It’s like having an onboard mechanic (or doctor) always checking to see if everything is OK.
In 2016, the second most common repair for the light coming on also was the most expensive, a catalytic convertor. The average cost for that repair is around $1,200.
Now here is the golden nugget: The most common reason a catalytic convertor goes bad is human procrastination, not getting the “check engine” light fixed soon after it comes on. An improperly running engine puts off an imbalance of air/fuel mixture that overworks the catalytic convertor, causing it to fail.
According to CarMD, the most common “check engine” light repairs are around $250-$350.
Drive with it on too long, and you add another $1,200. Sounds like a no brainer to me; get it fixed soon.
Now to the next part of diagnosing and repairing “check engine” lights.
Often, we have a vehicle come in with multiple codes present. For the sake of integrity and cost, we repair only what we feel is the most common and prevalent code first, clear the codes and test-drive the vehicle. If the light does not come back on, we will release it to the customer and inform him or her that if the light comes back on, we will rescan for free and do more repairs if necessary. The reason for waiting is simple: One sensor or problem can affect other sensors into reading outside the parameters, causing the light to come on.
Reading, diagnosing and repairing the “check engine” light is the most challenging repair we have in our shops. Having the enhanced (factory) scanner is imperative to doing the job properly.
This is an area where getting it fixed soon is wise. The good news is that, dollar for dollar, a newer engine takes less maintenance and costs less than an older engine.
When do you need brakes?
One of the concerns we have at our shops is people bringing in their vehicle for new brakes when it’s not necessary.
New brakes start out at 100 percent of what we call the lining or thickness of the brake pad (disc brakes) or brake shoe (drum brakes). Every time you use the brakes, you take off a very small percentage of this lining.
We estimate the life of your brakes in percentages. Even when lining is down to 20 percent, your brakes are working 100 percent. I perceive a fear: “Only 20 percent? Wow, I must get my brakes replaced.”
Not true. Even brakes with 10 percent left are 100 percent safe. Sometimes we even hear stories that your brakes MUST be replaced now or they will not work. This is very seldom true or almost never if it’s about brake lining. We do recommend replacing brake lining at 10 percent to err on safety. The moral of this story: Sometimes it’s a good idea to get a second opinion.
Never leave any living animals in a vehicle with the windows rolled up. On a hot sunny day, temperatures can rapidly increase to above 135 degrees. Leave the animals at home; it’s a matter of life and death for them.
When getting into a hot car after it has been sitting in the sun, roll down the windows for the first three minutes of driving. I have measured the temperature of a closed-up vehicle, and it was over 135 degrees. Rolling the windows down will expedite the cooling process.
Questions or comments are more than welcome. Email me at [email protected]
Posted on 18, April, 2017
The future of the automobile in the next few years is going to be very exciting, even incredible. As electronics, computers and great designs get more refined and less expensive; they enter the automotive world more often. Electronic systems and motors are so dependable now, cars are chock full of them. Vehicles now operate with more than 100 million lines of software code, and that number is predicted to go to 300 million lines of code. (More than the Boeing 787 Dreamliner)
Some newer high-end cars have up to 100 electronic control units (ECU) with 25 to 200 microprocessors. To keep all these communications working, vehicles are using FlexRay, CAN Bus and LIN (motor control) systems. Basic vehicles have about 1,350 wires for about 1.5 miles in length: high-end vehicles have up to 2,300 wires adding up to about 2.6 miles of wires. Plus, modern vehicles can contain up to 100 electric motors and solenoids. That’s a far cry from the 1960s cars.
We have all heard about the next generation of technologies, here are the five levels of automation and driver’s assistance that are a reality of new vehicle:.
- In the most basic stage of automation, the driver does all the work but the vehicle can take over one of two vital functions - steering or speed controls. An example would be adaptive cruise control, which keeps the vehicle in front of you at the same distance. The vehicle can accelerate or brake. The steering assist would happen if you change lanes without using your turn signal, for example; brakes on one side would apply, nudging you back into your lane.
- Partial automation: The more advanced cars today can take over steering, acceleration and braking. Tesla, Mercedes-Benz, BMW and Volvo are doing this now.
- Conditional automation: This car can drive itself but the driver needs to be behind the wheel to take over if intervention is needed, as if the car’s system gets confused. The newest Tesla has this.
- High Automation: This is where the driver lets the car take complete control. This level of sophistication is not currently available to consumers, but is being tested in some areas by Google, BMW, Bosch, GM, Benz, Nissan, Tesla, Ford and Uber. Lots of input and the roads need to be mapped to the inch with all the inputs we see such as lights, intersections, crosswalks etc.
- Full Automation: This would describe George Jetson’s vehicle if you remember that futuristic cartoon. All control are built in, and this kind of vehicle would have no steering wheel or pedals for driver input. I know of none of these in reality.
There are many advantages to the idea of fully or partially self-driving vehicles. About 94 percent of crashes occur because of driver’s errors, so these vehicles would be safer. Imagine if all vehicles could “talk” to each other; the chances of a crash would be eliminated. Traffic would flow smoother on freeway, and the “wave” of vehicles speeding up and slowing down could be eliminated. Driving faster and smoother would allow more vehicles to efficiently use the same road.
The downside would be the process of people learning to ‘trust” smart vehicles, but after a short time driving with these system in place, one’s fear would ease.
The cost of equipping these vehicles would be great but the real challenge would be “mapping the roads “so a vehicle would know where it was going if clues where taken away. Knocked down or defaced stop signs, a snow covered highway or a whole multitude of other problems.
Want to lean more? Join me at City Club of Eugene forum, “The Age of Self-Driving Cars,” on Friday, May 12th at 975 High Street noon to 1 pm, get there early for the best seating. I’m going to be the first questioner.
I’m excited for the futures of vehicles. Repairing vehicles for over 42 years, the changes have been incredible.
1. Lighten your key chain; if you have lots of leys or other stuff on your keychain, it put extra strain on your ignition lock tumblers. Remove these will extend the life of those tumbles saving you money and inconvenience.
2. Driving a pre-2000 vehicle. These are easy for thieves to still, more if it’s a 1990s Toyota or Honda. Keep your vehicle safe by installing a steering wheel lock like the Club. The Club is available from the Eugene Police Department for $12.50; it’s a cheap price for peace of mind.
3. Buying a vehicle for the young adult who just turned 16? Newer vehicles have so many more safety features, both to stay out of a crash, ABS brakes, traction and stability controls. If a crash happens, advance air bags systems may make a huge difference. Buy newer and safer.
4. If an animal jumps out in front of you, continue to look where you want to go, not at the animal. Where you look, the car will go. Apply brakes firmly but don’t swerve to avoid the animal, staying on the road is the safest thing to do. This simple tip will save you for injury or worse.
Question or comments? You can e-mail me at firstname.lastname@example.org. I will answer all questions promptly and use the best for this column
Posted on 17, April, 2017
As vehicles get more complicated, new twists and more advanced multiplexing and technology only add to the challenges of diagnosing automotive problems. Yet in the world of auto repair, some customers don’t always perceive the valve in the cost of diagnosis. Throw in the fear of unknown and lack of trust into this equation, and some people start looking elsewhere for answers. The results most times are questionable.
Our shop technicians spend weekends and evening in classes to learn about the new technology. Newer vehicles are the most complex object that most people own and it is time consuming for technicians just to learn how to use new scanners and understand all of their capabilities. In the past two weeks, four of techs spent Saturday and Sunday in classes.
Recently, we had a customer bring in his European import with a check engine light on and running poorly. We hooked up a specialty scan tool, scanned the vehicle and found a P0301 code, misfire #1 cylinder. We called the customer asking for permission to spend time diagnosing the problem and what it would take to repair.
He called back and said he just wanted us to replace the fuel injector in the cylinder, saying that he had read it on the Internet. Very seldom do we find a fuel injector causing this problem but he said he was willing to take the risk. $245 later with a new injector, the vehicle still had the same problem. The owner then gave us permission to diagnose the real issue, which turned out to be two bad spark plug wires to that cylinder. (Yes, this vehicle has two spark plugs per cylinder). The customer was very understanding but we didn’t take out the injector because by that time it was used.
We had another customer request that we put a clutch switch in a Japanese import because the starter didn’t crank over on occasion even though we have never have replaced a clutch switch on that kind of car. It didn’t fix the problem.
Self-diagnosis also is a problem in the medical field, I have been told. But, I must admit that there is valuable information on the web, we use pay sites, $105 per month, which gives us direction. I repaired my motor home refrigerator from information in a blog about the problem I was having. But when it comes time to diagnose potentially complicated problems that could be expensive to repair, my advice is to trust the professional who is working on your vehicle. Most times it will save time, money and aggravation.
How often to change oil?
One of the questions I come across as how often should you change your oil. This is a great question and I don’t have a black and white answer. There is no one size fits all answer other than to say oil should be changed frequently enough so that no engine damage is done.
The low end is every 3,000, twice a year and there are some manufactures that do as high as 20,000 miles with no time recommendations!
There is one manufactory with high mileage recommended oil services that we have found an alarming amount of worn out engines at 80-90,000 miles.
I will try and explain what I recommend is best. Cars before the year 2000 using conventional oil should have the oil changed every 3 to 5000 miles depending on how many miles you put on your vehicle per year. If you're putting 12 to 15,000 or higher miles on it a year every 5000 miles is fine but at least once a year in most cases.
If you have a car between 2000 and 2010 using conventional oil every 5000 to 7500 miles if you put over 10 to 12,000 miles per year but again, at least once a year.
If you have a car from 2010 to 2018 with synthetic oil and most newer cars take synthetic oil every 5 to 15,000 miles will work on oil services.
Now comes the exceptions is how do you drive and where the car is driven. Short in town mileage during the cold moist winters when the engine doesn't get warmed up is the most difficult on oil. Keep in mind, some of the combustion leaks past the rings in the engine fuel and moisture. This contaminates then mixes with the oil to create sludge and other harmful stuff in your oil. Twice a year or every 3,000 miles on this condition.
The 15,000 mile extreme on oil services would be if you did a lot of freeway driving, have a newer vehicle, use synthetic oil because you would be putting on 1 mile per minute at 60 miles an hour and keeping the engine warm or hot.
There are many exceptions to these recommendations; the most common one is for folks with classic cars like myself. I have a 69 VW Karman Ghia. It sits in storage most times, driven about 200-500 miles per year. I only drive it in the summer when not raining and at least 40 miles to get the oil hot. I change the oil every three to four years.
One thing is certain, In the long run, regular oil service is much more affordable than engine replacement. At the shops, we see a lot of wasted engines because of lack of oil services.