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Ignition cyl1 trigger over suspect bad CAM
Posted to the Waveform Library on 10/23/2020

This image was captured to see where cylinder number one was firing on a CAM signal I suspect to be bad. Vehicle has low vaccuum and negative STFT @ idle (-20) and maxed out O2 voltage of 850mv. Suspect backlash on camshaft due to loose timing chain and/or ove...