FirstLook EDS-100 being used on the intake manifold.
Vacuum Waveform
Waveform shows the effect of worn cam and lifter in a 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.