secondary wave form

Hi,
got my starter scope. hantek 6074be. put it to work on my sons truck that i wanted to test anyway. main reason i wanted to get one .
strange secondary pattern (I think). tell me waht you all see. If you can see the traces the lower one should be yellow is an aswave inductive pickup on #1
1974 ford bronco
eecIV mass air converion
roller cam retrofit
Thanks in advance

It needs to be flipped.

Your secondary wave is upside-down. Turn on INVERT to flip it right side-up.

Your spark line and firing line are very inconsistent. This indicates variable resistances. In the firing line, you don't want anymore than 2 or 3 kV variance. For the Spark line, you want to see 1.5kV - 2.5 kV

A high firing line, accompanied by a high spark line, is an indication of High Secondary Resistance....Cap, Rotor, Plugs, and wires.

Thank you,
figured out it looked inverted. will change that next test. it was hard to capture as it would walk / cycle to the right of the screen all the time with no action on my part, then settle back to this. even channel 1 with the aswave clamp. is that normal?
The erratic spacing (time) of the spark lines? Hall effect problems in distributor? pcm advance /retard? any thoughts.
this is fun

thank you,
what about the upward travel of burn line with the second spike? the middle of your picture the crop out of mine. that seams odd to me.

Jho66 wrote: it was hard to capture as it would walk / cycle to the right of the screen all the time with no action on my part

To keep the trace steady, you need to set a "trigger". I am not familiar with a Hantek, so I will be of no help to you there.

The erratic spacing (time) of the spark lines? Hall effect problems in distributor? pcm advance /retard? any thoughts.

My guess would be RPM fluctuation, due to misfires.