*** Restricting New Posts to SD Premium Members ONLY *** (09 May 2025)

Just made a new account? Can't post? Click above.

A place to discuss hardware/software and diagnostic procedures

Hantek 1008C 350 Spark problems?

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67178 by jdkoontz
Hantek 1008C 350 Spark problems? was created by jdkoontz
I have a 350 Chevy running rough.
The dist is a small cap Summit Racing Electronic ignition. Coil is a 8222.
Have I got this setup right? The spark signal looks noisy?
Is this a bad coil? Or bad ignition module?
 
Attachments:

Please Log in or Create an account to join the conversation.

  • juergen.scholl
  • juergen.scholl's Avatar
  • Offline
  • Platinum Member
  • Platinum Member
  • Active partschanger
More
1 year 1 month ago #67179 by juergen.scholl
Replied by juergen.scholl on topic Hantek 1008C 350 Spark problems?
Where exactly are you connected to with your leads?

I am afraid this scope is not capable of delivering useful captures on that long a timebase on high frequency signals as ingnition events are
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67180 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
Channel1 is on #1 spark plug wire. Channel2 is on coil wire. Both are inductive probes.
 

Please Log in or Create an account to join the conversation.

  • juergen.scholl
  • juergen.scholl's Avatar
  • Offline
  • Platinum Member
  • Platinum Member
  • Active partschanger
More
1 year 1 month ago #67183 by juergen.scholl
Replied by juergen.scholl on topic Hantek 1008C 350 Spark problems?
Not doubting your words but I suspect you're actually using capacitive probes. This scope's limitation regarding sample rate combined with the applied time base/settings makes it next to impossible to capture meaningful secondary waveforms imo.

A1 is just an example waveform overlayed on the screen?
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67184 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
The probes are HT25 hantek. They are listed as inductive capacitive? Does that make sense?
 

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67185 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
A1 is the example from hantek.

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67186 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
I'll rescan today to supply better scan.
The following user(s) said Thank You: juergen.scholl

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67187 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
Did another scan this afternoon.
 

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67188 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
Channel#3 is coil wire. Channel#1 is cyl #1.

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67189 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
Why does the coil scan get inverted? Seems like the #1 cyl is not inverted?

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67192 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
Had a spare coil, so I swapped it out to see if the coil was the problem.
 

Coil now looks good, but can someone tell me why the coil signal is inverted? Is that OK for these scopes?

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67193 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
Channel3 is the coil wire. Channel5 is plug #1 wire. Does this plug signal look correct for this scope?

Please Log in or Create an account to join the conversation.

  • juergen.scholl
  • juergen.scholl's Avatar
  • Offline
  • Platinum Member
  • Platinum Member
  • Active partschanger
More
1 year 1 month ago #67196 by juergen.scholl
Replied by juergen.scholl on topic Hantek 1008C 350 Spark problems?
What you describe as an "inverted" signal of the secondary ignition is completely normal on negative fired ignition systems. The voltage is seen as "outgoing"

Dedicated ignition scopes directly invert the view so you'll see an upside image. If your scope doesn't do this automatically you still can manually invert the image to see in the 'typical' way if you prefer so.
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
The following user(s) said Thank You: jdkoontz

Please Log in or Create an account to join the conversation.

  • jdkoontz
  • jdkoontz's Avatar Topic Author
  • Offline
  • New Member
  • New Member
More
1 year 1 month ago #67204 by jdkoontz
Replied by jdkoontz on topic Hantek 1008C 350 Spark problems?
Found the invert settings.  


Is this a normal view of the plug wire probe when that cyl is firing?
Is the slow voltage decline telling me anything?

Please Log in or Create an account to join the conversation.

Time to create page: 0.415 seconds