PicoScope 7 Automotive
Available for Windows, Mac, and Linux, the next evolution of our diagnostic scope software is now available.
Fat Freddy wrote:To me, it kind of looks like it's tracking to ground.
What colour are your plugs?
FF
Is it not correct that everything after the EMF kick (spark line) in the primary is a feedback of the secondary ? so why don't they match then if the secondary is shorting to ground(picture in previous post) (picture below of 1&4 which i agree looks like short to ground) ? OP can you verify if you were coupled to the correct side of the coil secondary (+/-) as you don't seem to have changed probes & there is a strange sub zero voltage going on ?Fat Freddy wrote:I think the same.
First kick on the Primary and nothing on the secondary.
FF
hi, yes i have connected to the correct feed.Robski wrote:Is it not correct that everything after the EMF kick (spark line) in the primary is a feedback of the secondary ? so why don't they match then if the secondary is shorting to ground(picture in previous post) (picture below of 1&4 which i agree looks like short to ground) ? OP can you verify if you were coupled to the correct side of the coil secondary (+/-) as you don't seem to have changed probes & there is a strange sub zero voltage going on ?Fat Freddy wrote:I think the same.
First kick on the Primary and nothing on the secondary.
FF
hi,Robski wrote:tb
Can you give us a heads up on how this ignition system works, how many wires to a coil pack, is there an ignition module etc ?
The last captures you have posted including the coil current have some crazy dwells going on & current amplitude, were both captured under the same conditions ?
The current ramps also look like there's a short with steep start to the up ramp & negative switch off characteristics.
Where does the ignition pick up come from ?
Have you checked the resistance of the plug leads ?
Do you have an adjustable spark tester ?
PS pay attention to your sample rate, detail can be lost if zooming in when the sample interval is low.
Is it not correct that everything after the EMF kick (spark line) in the primary is a feedback of the secondary ? so why don't they match then if the secondary is shorting to ground(picture in previous post) (picture below of 1&4 which i agree looks like short to ground) ?Robski wrote:Fat Freddy wrote:I think the same.
First kick on the Primary and nothing on the secondary.
FF