Help with ignition wave form

Frs2180 · Post by **Frs2180** » Tue Nov 05, 2019 8:47 am

Please be gentle I'm very new to all of this and have no mentor to guide me. I have a Chevy spark with a cylinder 2 misfire and rich code. I have played about with the scope in my spare time and need help on what I'm seeing. I will post a few pics. Please remember I am very novice at all this but want to learn. The primary current is taken at the fuse box the secondary voltage is back probed at coil pack. No inductive pick up at the time of scoping.

liviu2004 · Post by **liviu2004** » Wed Nov 06, 2019 7:03 am

How come you’re still alive?

If you back probe secondary voltage, your nice expensive tool would be fried by now. And you also.
Compare with a known good.

landroverman1958 · Post by **landroverman1958** » Sat Nov 23, 2019 10:48 am

Good morning, how does that help,saying that the exspensive scan tool would be fried?Ah but of course it is a scan tool as well so it enables the operator to view live data and scope at the same time. i may have missed the introduction of the scan tool side on the pico? i dont mind being corrected about that,and i suspect an attenuator would be needed for the pico,, but yes compare the known good against a suspect capture.

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