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Take Charge Of A/C
In the years ahead, a new refrigerant called HFO-1234yf will gradually replace R-134a in new vehicles. more
Air And Oil Filter Change Intervals Depend On Use
Back in the day when most motorists changed their oil every 3,000 miles or three months, and engines were equipped with quart-sized filters, some penny pinchers only replaced their oil filters at every other oil change. more
ASE P2 TEST PRIMER: Ignition System
Distributorless Ignition Systems (DIS) include "waste spark" DIS systems with coil packs and plug wires, Coil-On-Plug (COP) ignitions (one coil per spark plug), and Coil-Near-Plug (CNP) ignitions (one coil per plug with a short plug wire between the plug and coil). more
Is it necessary to replace all of the TPMS sensors when a vehicle needs new tires?
The lithium ion batteries inside TPMS sensors may last anywhere from five to 10 years. Five to six years is a more typical lifespan for older TPMS sensors. more
Oil Filters: It's What's Inside That Counts
Filter manufacturers use a variety of different filter media to keep the oil clean. more
Motor Oil Is A Changin'
The increased emphasis on fuel economy means today’s oils are thinner and contain more friction modifiers and viscosity extender additives. more
Engine Control Module: The Brains Of The Operation
The engine control module performs a wide variety of functions that are necessary to operate a vehicle. more
Understanding Engine Sensors
While their individual configurations might be different, the function of any engine sensor is to provide input data which the powertrain control module (PCM) processes to control output functions like the air/fuel mixture ratio, fuel injection mode, spark timing advance, camshaft timing, throttle opening and idle speed. more
When Selling Hoses, Always Consult Cataloging For Recommendations
To withstand extreme temperatures, most modern coolant hoses are now made from ethylene propylene (EPDM rubber, which can endure operating temperatures ranging from -40 to +275 degrees F. more
ASE P2 TEST PRIMER: Battery, Charging and Starting Systems
The battery stores energy to provide starting and reserve power for the electrical system. Lead-acid batteries must be maintained at or near full charge for maximum life (average life is 4 to 5 years). more
TPMS UPDATE: No Spare, No Problem
In addition to technical improvements that have made flats less likely, TPMS provides drivers with warnings of low air pressure, leaks and punctures. more
A Chemical For Every Job
There are general purpose cleaners that can be used for a variety of cleaning applications, but there are also specialty cleaners available for more specific purposes. more
All In The Timing
Because their remaining service life is difficult to estimate, timing belts must be replaced at specific mileage intervals to prevent failure. more
Choose The Right Gasket For The Job
Gaskets come in a wide variety of materials and designs, so there is often confusion as to which brand of gasket or which type of gasket is "best" for a given application. more
A Look At O2 Sensors
Oxygen sensors have been used for more than a quarter of a century, dating back to 1980 when the first computerized engine control systems appeared. The oxygen (O2) sensor is part of the fuel management system. It monitors unburned oxygen in the exhaust.... more
TPMS Update: Sensor Replacement
More than 68 million vehicles on the road today have direct TPMS systems, writes Brake & Front End Editor Andrew Markel. more

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