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secondary ignition different type of waveform

  • gilad.benyosef
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9 months 1 week ago #74249 by gilad.benyosef
secondary ignition different type of waveform was created by gilad.benyosef
hi all 
someone known with this secondary ignition waveform ? its a 2022 suzuki jimnny C.O.P , measured with H502 (Hscope) using hantek AT25 probe. 
my voltage config is wrong , should divided by 20 , sprak line is around 48kv , all cylinders shows the same waveform 
i wonder if it can be diagnose , burn time dewll time etc 
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9 months 1 week ago #74253 by Noah
Is there anyway you can post a screenshot of the pattern?
I'm not a fan of downloading attachments...

"Ground cannot be checked with a 10mm socket"

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9 months 1 week ago #74255 by gilad.benyosef
Replied by gilad.benyosef on topic secondary ignition different type of waveform
 

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9 months 1 week ago - 9 months 1 week ago #74259 by Chad
How and where are you capturing the waveform? Judging from the dwell section, your waveforms are upside-down. Does your scope have an invert function?

If we invert it,....
 
it still looks terrible but, now, it looks like, possibly, a shorted secondary with, absolutely, no gap to jump. Is this a 2-wire coil? Can you capture a primary voltage waveform? Do you have an amp clamp to capture a current ramp of the coil?

 

"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."

I have learned more by being wrong, than I have by being right. :-)
Last edit: 9 months 1 week ago by Chad.

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9 months 1 week ago #74260 by gilad.benyosef
Replied by gilad.benyosef on topic secondary ignition different type of waveform
Sorry im a bit rookie , how can i plug primary voltage ? Just back probe the signal wire ? I think its a 3/4 wires coil i need to check
Its a brand new car all cylinders shows the same signal
I have an amp clamp ill try to pick signal tommorrow
Thank you for response

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9 months 1 week ago #74261 by Chad

how can i plug primary voltage ? Just back probe the signal wire ?


Back-probe the Coil Control wire. Expect a voltage spike of about 400 volts. Make sure that your scope is rated for voltage of this range. If it isn't, you will have to use an attenuator.
However, this can, only, be done with 2-wire coils. Unfortunately, we do not have direct access to the Coil Control wire on 3 and 4-wire coils. We, only, have access to a transistor that controls the coil.

Are you trying to diagnose problem? Or, are you just trying to understand what you are seeing in waveforms captured from a good, running vehicle?

"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."

I have learned more by being wrong, than I have by being right. :-)
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9 months 1 week ago - 9 months 1 week ago #74266 by gilad.benyosef
Replied by gilad.benyosef on topic secondary ignition different type of waveform

so what are your suggestion for 3/4 wires coil? just use an amp data ?
do you think perhaps my setup giving me a false measure? HT25COP and H502 (Hscope) ,though i manage to get good signals from man different cars 

Last edit: 9 months 1 week ago by gilad.benyosef.

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