I used my Xmas Amazon vouchers to buy a new toy -- a proper oscilloscope an Owon SDS7102v with the optional internal battery..

It can connect to a PC by USB or LAN or save to a USB card it also has a VGA monitor output.
It has a deep memory which makes good for capturing ignition and injector waveforms.


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This is the first capture I tried the HF filter makes for nice noise free traces.

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In the distant past I had one on my work desk peering into chips looking for static damage... Very handy at work but what use at home??

All in what you know to look for
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Below is a current ramp from a coil




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Back in the day I used an oscilloscope chasing signals around radar cabinets when I was in Air Force. I enjoyed it, chasing pulses in the micro range. It's all in the setting up of the scope for whatever particular frequency/voltage your looking for. GIGO.

[Edited on 7/2/16 by wylliezx9r]