Waveform shows the effect of worn cam and lifter in a 2000 GMC Safari Van.

Case Study: Vaccum Waveform for 2000 GMC Safari Van


Cam and lifters were replaced. Waveform shows effects that engine miss had on valve seat. With a cleaning and or normal running this should return to normal.



Note Simple Hookup to Engine


Photo of parts replaced showing cam and roller damage.
“This mystery could not be solved without the First Look Sensor hooked up to a Pico Scope and the training and support from Tom Roberts (Autonerdz)”
Waveforms and photo’s courtesy of Wilf Breyfogle.