First time poster and first time scope user…
How can I or do I set this up to read voltage? I need to be able to read the firing voltage on an ignition system as well as test the spark timing coming out of the ECM.
Never used a scope before so I am kinda beating my head at the wall right now with this…
Help 
To read the firing voltage (pattern) you will need a [color=#0000BF]secondary ignition capacitive pickup[/color]. Note that this will not provide a calibrated measurement of the voltage, however it will allow you to capture the waveform of the ignition event.
It will look similar to this (this was captured using the same pickup as linked to above):
To determine spark timing you will need access to two signals, one related to the crankshaft position of your engine (preferably TDC of cylinder #1) and the other related to the the firing of the cylinder to which the TDC signal relates.
The spark advance or retard will be the time duration between the gap ionisation/spark event as shown above, divided by the time between crankshaft TDC events, times 360°.
For example; if the engine is running at 1000 rpm the time between TDC events will be 60ms. So if the spark event occurs 0.00167ms before the TDC event the timing will be 0.00167/0.060 * 360 = 10.00°–I.e before TDC.
If the spark happened 0.00167ms after the TDC event the timing would be -0.00167/0.060 * 360 = -10.00°–I.e. after TDC.
[quote=“cliffyk”]To read the firing voltage (pattern) you will need a [color=#0000BF]secondary ignition capacitive pickup[/color]. Note that this will not provide a calibrated measurement of the voltage, however it will allow you to capture the waveform of the ignition event.
It will look similar to this (this was captured using the same pickup as linked to above):
To determine spark timing you will need access to two signals, one related to the crankshaft position of your engine (preferably TDC of cylinder #1) and the other related to the the firing of the cylinder to which the TDC signal relates.
The spark advance or retard will be the time duration between the gap ionisation/spark event as shown above, divided by the time between crankshaft TDC events, times 360°.
For example; if the engine is running at 1000 rpm the time between TDC events will be 60ms. So if the spark event occurs 0.00167ms before the TDC event the timing will be 0.00167/0.060 * 360 = 10.00°–I.e before TDC.
If the spark happened 0.00167ms after the TDC event the timing would be -0.00167/0.060 * 360 = -10.00°–I.e. after TDC.[/quote]
That’s it man! That’s the infos I also lookin at! Thanks