Instructor Dave Hobbs gives some insight into something a lot of techs already know about and may just take for granted–two stage temperature sensors. He covers some specifics about the sensors, testing procedures, and how to avoid replacing parts that are good only to find you still have a problem. He also gives some details and insight into the differences in design and wiring of these sensors between the individual manufacturers.
John Thornton discusses a case study about a high milage 1997 Chrysler Concorde with rough idle issues. The vehicle has no codes and the coil, plugs and wires have all been recently replaced. John goes into great detail on how he went about diagnosing the problem by using scan data and waveform analysis.
Have you spent hours trying to repair a driveability or emission problem and couldn’t resolve the issue? Many of these problems can only be repaired thru flashing. John Thornton gives you the training you need so you can be prepared when you come across a problem that cannot be fixed without a software update.