Custom Bay: Supercharged Profits July 1, 2008 By: Steve Temple

In textbook terms, a vortex refers to any spinning flow of fluid swirling rapidly around a center. A Vortech, on the other hand, is the name for a centrifugal supercharger used on a variety of muscle cars, import tuners and sport trucks to pump up the performance.

Scope & Scan: Some ABCs of CKPs July 1, 2008 By: Jim Garrido

Unlike the Variable Reluctance (VR) sensors that output an AC signal, the output from a Hall-effect sensor is a square wave. This square wave starts from the sensor reference ground level to a positive DC voltage of typically 5, 8, 10 or 12 volts, depending on vehicle application. Hall-effect sensors, unlike VR sensors, always are supplied a power and ground in order to operate the sensor's internal electronics.

Servicing Imports July 1, 2008

This is the ninth generation Corolla, and it shares its platform with the Toyota Matrix/Pontiac Vibe. Those models are available with all-wheel-drive, and although the base Corolla is about as simple as a modern economy car can be (it even has manual windows), there are some sophisticated options. Along with power windows and locks, the LE and S models are available with traction control and brake assist (which provides full boost in a panic stop), and the XRS "sport" model has upgraded suspension parts, bigger wheels and tires and more horsepower (but not more torque).

Active Wheel Speed Sensors July 1, 2008 By: Jacques Gordon

Wheel speed sensors detect the rotation speed of a wheel that's moving. Active wheel speed sensors detect rotation speed all the way down to zero, and the newest sensors can detect the direction of rotation, too. Four different sensor designs are in use today.

Motor Age Garage: Acing the Exam July 1, 2008 By: Peter F. Meier

When I first started in this business, you could diagnose most running problems based on a generalized set of rules. Of course, this was in the day of carbureted engines and mechanical ignition systems. Today, the Engine Control Module (ECM) does a pretty good job of keeping an eye on things. While there are general methods used by the ECM for testing, the specific testing procedures programmed by an individual manufacturer can have an impact on how you proceed with your diagnosis and repair.

Factory Bulletins July 1, 2008

Factory Bulletin

Brake Pedal Pulsation July 1, 2008 By: Jacques Gordon

When a brake pedal pulses beneath your foot, no doubt your first thought is "warped brake rotors." Your next thought might be about how it happened, because if you're going to get paid for the repair, you have to make sure it doesn't happen again. Fortunately, most of the things that cause pedal pulsation happen in the service bay. With close attention to detail, it's easy to avoid those particular comebacks.

Custom Bay: Press and Play June 1, 2008 By: Steve Temple

Some of the best business opportunities are cleverly hidden in plain view — literally. Check out these exterior vinyl graphics inspired by the original Mustang Boss 302. The cost of the materials is low, the profit margin high and installation is really simple. What's not to like?

Factory Bulletins June 1, 2008

SRS light illumination and fault codes for the Occupant Position Detection Sensors (OPDS) have been the subject of a class action lawsuit. As part of the settlement, American Honda has extended the warranty on these sensors to 10 years or 157,750 miles. Not all vehicles are included in this coverage.