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Don’t Back Down When Recommending Ride Control
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By chevyguy
This car has nothing but issues, now I have water coming in when it rains and my back seat floor is a puddle. Took my spare tire out and have water in there also. Sprayed the whole car down and can see the water coming in when I spray the roof. Looks like it may be coming from the roof rack area. Took the panels off to look and the roof/body seal may be the culprit. Also found a bulletin on this. I ordered some
link hidden, please login to view so I'll try and replace the seal. Anyone run into this on an equinox or terrain?
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By Counterman
MEYLE recently launched the MEYLE HD control arm for the Tesla Model 3 and Model Y.
The new control arm is made of high-strength forged aluminum, and features a redesigned ball joint, larger-diameter ball stud and redeveloped bushings.
As a result, the optimized and reinforced MEYLE HD control arm is specially designed to handle the high stresses of the heavy and powerful Tesla vehicles, according to the company. Backed by a four-year guarantee, the control arm is designed to last longer, provide extended driving safety and deliver “a more fun driving experience.”
“You might remember – there was a lot of frustration in the global Tesla community a while ago,” the company said. “Drivers were reporting a great deal of squeaking and rattling coming from the premium manufacturer’s models.
“Our engineers at MEYLE were on the case right away and identified the Tesla control arm as the source of this nuisance. As always, they analyzed it and put it through an extensive multistage re-engineering process: the MEYLE HD principle. As a result, they developed a completely new technical solution that is now manufactured in our own production facilities.”
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By Counterman
Volkswagen HVAC systems have come a long way in the past 20 years. While the basics of heating and cooling may be the same, the controllers and sensors have improved dramatically. No longer does a driver have to worry about dealing with fogged-up windows or bad smells driving behind a semi-truck.
When a driver sets a temperature in the control head of an HVAC system, what does it mean to the vehicle? Seventy-two degrees could be captured at many different settings depending on the outside temperature, humidity and even the position of the sun. When a passenger then decides that 70 degrees is a better temperature for her zone, things get even more complicated.
Automatic Temperature Control (ATC) systems require a complex array of internal and external sensors that look at the temperature, humidity and quality of the air inside the vehicle.
TEMPERATURE SENSORS
To maintain a preset air temperature, the VW HVAC system will typically have one or more interior air temperature sensors, an ambient (outside) air temperature sensor, and possibly one or two sunload sensors.
Interior air temperature sensors are usually simple, two-wire thermistors that change resistance with temperature, but some are infrared sensors that detect heat from the vehicle’s occupants. This thermistor-type usually has an aspirator tube that pulls air through the sensor when the blower fan is running. Others use a small electric fan for the same purpose. A plugged aspirator tube or inoperative fan will slow the sensor’s response to temperature changes.
Most air temperature sensors have a “negative temperature coefficient,” which means they lose resistance as the temperature goes up. A simple way to check this type of sensor is to use a blow dryer to heat the sensor. The resistance should drop as the sensor warms up.
Ambient air temperature sensors typically have a slow sample rate to even out variations in readings that may be sensed at different vehicle speeds. When the vehicle stops moving, heat can build up quickly around the sensor and could mislead the ATC module into thinking it’s getting hotter outside. So, most ATC modules look at the ambient sensor input only every couple of minutes instead of continuously. On some applications, the ATC module may even ignore input from the ambient sensor when the vehicle is not moving.
There are other temperatures in the various ducts. Also, most systems will have sensors before and after the heater and evaporator cores. These sensors measure the performance of the system.
SOLAR LOAD SENSORS
Many ATC systems also make use of a photodiode solar load sensor on the dash. This sensor allows the ATC system to increase cooling needs when the cabin is being heated by direct sunlight. On vehicles with dual-zone systems, there is often a separate sunload sensor for each side. Sunload sensors receive reference voltage from the ATC module and pass current when the light intensity reaches a certain threshold.
Some ATC systems have additional temperature sensors located on the evaporator and/or compressor to prevent evaporator icing and to regulate the operation of the compressor. Some vehicles also have duct temperature sensors and heater core temperature sensors to further refine temperature control. These are usually found on the dual-zone ATC systems.
HUMIDITY SENSORS
Humidity sensors are capacitance sensors that measure the amount of moisture in the air. The information from the sensor both regulates the volume of air projected onto the windows to reduce misting and manages the humidity levels inside the car to enhance climate comfort. These sensors are typically mounted at the base of the rearview mirror.
From the data delivered by the humidity and temperature sensor, the HVAC system calculates the dew point temperature of the air. Some systems use an infrared sensor that remotely measures the windshield and side window temperatures, as well.
The performance of the sensor can degrade over time and cause the sensor to malfunction and give false readings. If this happens, you will see a code stored in the HVAC module.
AIR-QUALITY SENSOR
Air-quality sensors can prevent harmful gases and unpleasant odors that can get into the car cabin when the vehicle is sitting in heavy traffic, passing through congested areas or driving through tunnels.
The sensor signals the fresh air inlet door/ventilation flap to close when undesirable substances are detected. Volkswagen, Audi and other import nameplate luxury car manufacturers are using this sensor. This sensor is typically mounted behind the grill. Just hot and cold? Not anymore!
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By Counterman
Performance Ride Technology (PRT) will be exhibiting its full line of shocks, struts and complete strut assemblies at AAPEX 2022.
The display will include a new product line and various first-to-market applications, according to the company. Some of the product launches apply to brand-new vehicles such as the 2022 Honda CR-V and 2022 Jeep Cherokee.
The new product line, PRT air shocks, is an OEM-quality replacement for air-suspension systems, “providing the luxury and comfort of a smooth ride at an affordable price,” the company said. The PRT air shocks and packaging also will be featured in the AAPEX Showcase.
In addition, the company will be presenting an extensive portfolio of heavy-duty applications. The PRT heavy-duty program offers coverage of more than 4,600 OEM references with 100% gas-charged shocks for trucks, trailers, buses, commercial vehicles, cement mixers, motorhomes and more.
PRT will be exhibiting in Booth A2261 at AAPEX, which is scheduled for Nov. 1-3 in Las Vegas.
PRT is a brand of ADD USA group, one of the largest manufacturers of shocks, struts and complete strut assemblies in the world.
“We are very excited to present the PRT air shocks and all these new applications to our clients,” said Bruno Bello, director of global category and marketing at PRT. “As an OEM supplier, we are continually investing in research and development of new products and technology, which allows us to bring the latest innovations to our clients at AAPEX.”
As a global presence brand, PRT also will exhibiting at Automechanika Dubai 2022.
For more information, call 770-238-1611 or visit
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By Counterman
The Automotive Aftermarket Riders Club (AARC) will “Ride for the Future” this October to fund scholarships and educational opportunities for the next generation of industry professionals.
AARC encourages those who support its mission to donate to the University of the Aftermarket Foundation, sponsor a rider or join AARC on this year’s epic adventure.
The scenic ride will begin at Eagle Rider Rentals and Tours in Las Vegas on Thursday, Oct. 27, with the riders heading to Zion National Park in Southern Utah and Lake Powell in Northern Arizona. The following day, the riders will spend the day at the Grand Canyon before heading back to Las Vegas on Oct. 29 via Kingman, Arizona on Route 66.
Interested riders can rent motorcycles from Eagle Rider Rentals and Tours with an advance reservation. For more information or to learn how to become a rider or sponsor, contact Jim McGonagle at [email protected].
To support the AARC Ride for the Future by making a donation to the University of the Aftermarket Foundation, visit
link hidden, please login to view and click on the donate tab or download and submit the AARC donor link hidden, please login to view from the resources section of the UAF website. The post
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