need help with secondary ignition waveform

I'm completely new to scopes.  bought dans book and watched videos but im still not sure what is going on with the burn line.  car is a 2009 corvette.  customer complained of a dead miss and violent shaking.  car has ran fine since its been in the shop and i cannot recreate the problem.  figured it would be a good time to try out my new scope. 
https://postimg.cc/gwTq4Nyd

  also i cant seem to figure out how to attach the picture correctly

I added it for you.
Under the entry field for the text that will be the body of your post click "add files".
Then you will be promoted to browse your files. Chose the one you want and click add.
If you wish to then have the attachment embedded in the post, click Insert.

That waveform has no firing KV, that I can see. I would suspect a shorted secondary, possibly. Can you post a waveform of the coil current ramp?

(By the way, "Dan's" name is Paul....Paul Danner.)

Thanks. The car has already been picked up. Never could get it to misfire 3 days in the shop, but that was the waveform I got while it was here. I did do a current ramp, but forgot to save it.