"I saw their add for a 2002 Lexus RX300 online and I stopped in and talked to Jeremy Mertes. He spoke with me about the Lexus brand and his own experience as both a salesman and a technician for Lexus and was EXTREMELY helpful, courteous and professional. He made me feel confident about my buying decision and really worked to help get me into this vehicle."
Engine knocking refers to the metallic sound an engine can produce when pressure is applied to the gas pedal. The noise may be a hollow knocking sound or more of a rattling sound—in either case, it's not a sound you want to hear.
When an engine pings, it releases pollution into the environment in the form of nitrogen oxide (NOx) and raw, unburned hydrocarbons (HCs). These two chemicals are poisonous gases that show up as yellowish-brownish in a polluted sky. They can also cause respiratory problems like asthma and emphysema.
Improper Combustion Process
An engine can ping (or knock) due to an improper combustion process. A "spark knock" is the result of combustion occurring too early. Early combustion can occur from carbon buildup inside the combustion chamber, a lean air/fuel mixture, and advanced ignition timing (spark plug firing too soon). In a properly-firing cylinder, the spark plug ignites the air/fuel mixture and a flame front starts on one side of the piston and burns across the top to the other side, which creates a rapid and evenly-expanding gas that pushes down on the top of the piston. When the air/fuel mixture is ignited prior to the spark plug firing, the two flame fronts collide, causing the pinging/knocking noise.
Engine Is Too Hot
An engine can ping because it is too hot. This is another uneven combustion scenario that is caused by the air-to-fuel mixture "lighting off" by itself. If the cooling system does not keep the engine's combustion chamber temperature in check, the air-to-fuel mixture will begin to spontaneously explode. This is also called "pre-ignition."
Improper Gasoline Octane
In addition to cooling system problems, pinging can be caused by improper gasoline octane, an overly lean air-to-fuel mixture, or a lack of proper exhaust gas recirculation. The exhaust gas recirculation system (EGR) was created to neutralize engine pinging by adding a small amount of exhaust gas to the air-to-fuel mixture going in to the combustion process, which limits the peak combustion chamber temperature.
Internal Mechanical Problems
Internal mechanical problems can also cause engine knocking. One such problem stems from excessive clearance inside the bearings in the connecting rods that transfer the downward movement of the pistons to crankshaft rotation. Each time the piston changes direction, there is a knock from the metal hitting metal. This is often referred to as a "rod knock." It is usually very rhythmic—it increases with engine speed and intensifies with engine load.
Other mechanical problems that lead to engine knocking are:
Be sure to properly inspect and verify the root cause of the knocking sound, as it can be tricky to pinpoint. You don't want to replace the entire engine only to find out that the knocking was coming from a cracked hub on the transmission flywheel or flex-plate. Ouch!
Lexus is proud to be the Official Vehicle and Sustainability Partner of the 34th America's Cup.
This year America's Cup will return to the US for the first time in 15 years. San Francisco's bay will be the world's arena for the best sailors and fastest high-tech and sustainable boats to compete in the world's most prestigious sailing race. Who will win the oldest trophy in International Sport (even pre-dating the modern Olympics) and be crowned the most prestigious sailors in the world?Smaller cars are the key to everyday travel through the city. Not only do you get the ease of parking in tiny spots, but you will also save a big of gas because of the stop and go traffic. Major cities are built to accommodate as many people in a small amount of space. Thus the city the streets and parking spaces are much narrower and smaller than others your use to.
Automatic transmissions are recommended for everyday travel to and within the city. The stress and fatigue will increase as you shift aimlessly with a manual transmission. Trust me on this one! During one of my trips to NYC, I shifted a manual transmission over 1000 times in an hour through heavy traffic. As many people swear by manual shifting, this is OK ( so do i) , it has its advantages, but it's just not well suited to city driving.
As parking spaces become harder to find, having that small car can get you in those tight spots. If you have the money, you can also invest in technology like back up cameras. These cameras will allow you to see how close you are to the car behind you through a pin hole camera on your trunk. Parking sensors work just as well, as you don't even need a visual, but only listen to a few beeps to know how close you are to the car behind you. Some luxury cars will have sensors in the front as well as the back.
Always drive inside your lane. Signal ten seconds before you lane change. Be cautious in hard driving conditions like snow and rain. Be careful of those huge pot holes ahead. So look give yourself some space between the car in front of your so that you have a better visual of the road ahead.
Avoid driving in the far right lane unless your turning. Metros, trucks, buses and other turning vehicles all enter the right lane. So to avoid any unnecessary backup time, drive in the middle lane if you are traveling straight for a while.
Now that you have a few tips. Try them out and you'll be on your way to being a pro at city driving.
Smaller cars are the key to everyday travel through the city. Not only do you get the ease of parking in tiny spots, but you will also save a big of gas because of the stop and go traffic. Major cities are built to accommodate as many people in a small amount of space. Thus the city the streets and parking spaces are much narrower and smaller than others your use to.
Automatic transmissions are recommended for everyday travel to and within the city. The stress and fatigue will increase as you shift aimlessly with a manual transmission. Trust me on this one! During one of my trips to NYC, I shifted a manual transmission over 1000 times in an hour through heavy traffic. As many people swear by manual shifting, this is OK ( so do i) , it has its advantages, but it's just not well suited to city driving.
As parking spaces become harder to find, having that small car can get you in those tight spots. If you have the money, you can also invest in technology like back up cameras. These cameras will allow you to see how close you are to the car behind you through a pin hole camera on your trunk. Parking sensors work just as well, as you don't even need a visual, but only listen to a few beeps to know how close you are to the car behind you. Some luxury cars will have sensors in the front as well as the back.
Always drive inside your lane. Signal ten seconds before you lane change. Be cautious in hard driving conditions like snow and rain. Be careful of those huge pot holes ahead. So look give yourself some space between the car in front of your so that you have a better visual of the road ahead.
Avoid driving in the far right lane unless your turning. Metros, trucks, buses and other turning vehicles all enter the right lane. So to avoid any unnecessary backup time, drive in the middle lane if you are traveling straight for a while.
Now that you have a few tips. Try them out and you'll be on your way to being a pro at city driving.
The Golden Opportunity Sales Event is here, and to celebrate we're giving one lucky person a chance to climb behind the wheel of an LFA to tear up a private racetrack. For full details and to enter visit http://UnleashtheLFA.com. #UnleashTheLFA
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Would you or somebody you know be a good fit working for our family of businesses? Village Automotive Group is currently hiring!
As of August 6, we currently have 15 job openings ranging from part-time work to full-time employment! For more information and to apply online, please visit www.villageautomotivegroup.com and click on the Careers tab.
Nighttime driving
• Even if it’s clear outside, driving at night is more difficult for most people
than driving in the day. That’s because it’s harder to see road signs and other
vehicles. It’s also harder to judge the distance between your vehicle and others.
• Always use your headlights when driving at night. Turn them on half an hour
before sunset, and keep them on until half an hour after the sun rises.
• Using your “brights” or high beam headlights will enable you to see a
greater distance if it’s not a foggy night. But be sure to switch back to the
low beams as soon as another vehicle approaches so the driver isn’t
“blinded” by the bright light.
• Make sure your windshield and headlights are clean.
Courtesy of Gempler's
