Keep your voltage levels out of the red with this five questions quick quiz on GM's charging systems. Before you attempt to tackle newer voltage control systems, refresh your memory on older charging systems.

Have you had a GM vehicle in your shop with one of these issues: no crank conditions, intermittent starting problems, start & stall, engine cranks but no injector pulse, the security light is on but the vehicle starts and runs anyway? If so, take our five question quick quiz and get great tips on intermittent problems that drive you crazy!

In this excerpt from Dave Scaler's complete training program 'Mechanical Misfires,' Dave shares a quick case study on a Pontiac Grand Am with a Quad 4 that came in with misfire DTCs. He discusses the diagnostic procedures and details of the compression test on this vehicles Quad 4. He gives some best practices and helpful hints for dealing with valve timing issues like those exhibited in this case study.

In this excerpt from Dave Scaler's complete training program 'Top 10 OBD II Codes: How to Fix Them Fast,' Dave discusses alternative tests for mass air flow sensors (MAF). He talks about how to use your scan tool in order to check several different things to determine the state of the MAF.

AVI has your training solution to diagnosing one of the most common intermittent electrical problems within any vehicle's electrical system. In the newly released Victory Over Voltage Drops, Instructor Dave Hobbs takes the hands-on route with a multi meter on both simulators and vehicles in the service bay as he demonstrates how you can perform simple, easy-to-follow real world tests that drive you to the right diagnosis and that problem car right out the door!

Amazing networking opportunities, excellent technology, and great technical training are waiting for you at the AVI Technical Training Conference, held alongside AAPEX in Las Vegas. Join us October 31st and November 1st in Vegas, and choose from over 17 technical and management related training classes. Get to know other technicians, shop owners, instructors and vendors at our trade show and networking events. Visit the AAPEX show floor and events while your in Vegas for the AVI Conference, and take advantage of TWO top-notch industry events at the same time.