2008 Chevy Aveo Timing check by scoping Crank and Cam
It does not take long to scope out a cam and crank signal. This vehicle was running really rough and stalling at times. PCM codes P0300 and P0172. Fuel trim -25 running rich, timing belt was off. Note that I used the IATN to locate known good and bad patterns. IATN stated that from the rising edge of the CAM signal there should [...]