I will show you how to troubleshoot the entire ignition system, including cam and crank signals, ECU to igniter control and igniter to ignition coil control using a simple test light. A follow up test will be done with a small single channel lab scope, showing yet another way to verify the same condition.

This is a common failure on the GM 2.2 Ecotec engine used in the Saturn Ion, Chevy Cavalier, Chevy Cobalt etc.

This case study is perfect for anyone interested in the working details of Toyota/Lexus coil over plug ignition system, and the very similar three-wire designs used by many other manufacturers.

This vehicle came in with a long history, a severe misfire complaint that two shops couldn’t fix, and lots of parts changing along the way.

In this video I will show you how to use simple, fast testing methods to determine diagnostic direction with a no start condition.

  1. How to test for a shorted ignition coil (Honda Distributor)
  2. 2005 Trailblazer 4.2 #6 cylinder misfire diagnosis (spark and fuel test)
  3. Ford 5.4 shorted coil primary winding and bad computer driver
  4. How to determine which cylinder is misfiring (cylinder drop test)