Oscilloscope Pattern
Evaluate ignition voltage peaks in response to sudden accelerator loads. Voltage peak No. 1 indicates dying-out process is not much higher than ignition voltage peak. Ignition system is okay. If beginning of dying-out process is considerably higher than ignition voltage peak as is shown in voltage peak No. 2, there is a fault in injection system such as lean mixture, defective injection valve or low compression. See Fig 1.