Thanks crackerclicker for the stuff. It helps me understand more about the sensing signal. However, still didn'n find a way to determine if the ionization feedback signal is good or not except using OBD, as the raw signal is quite random. maybe need to add a bandpass filter but I dont have the filte...

Hi all, Does anyone have the experience on testing the Saab "ionization" signal from the ignition coil? I am confused on the tesing method now... The current car I use for test is Saab 9-3 2006, 2L. Thanks in advance for the comments. Hi Steve, I saw there is waveforms for feedback signal of a Saab ...