As you know, for many years in our industry we have used a compression gauge to assist us in diagnosing mechanical problems. Well, today, electronics have vastly improved the techniques we can use to analyze in cylinder mechanical problems. See if your up to speed on diagnostic procedures using a pressure transducer.
Instructor John Thornton presents this in depth comprehensive case study of a 2002 Ford Explorer 4.0L vin E with a misfire at idle speed. John details the use of his scope and pressure transducer to perform a cranking compression test and goes on to point out the various indicators you should be watching your scope pattern for and how to identify problems.
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.