Coil per cylinder - Secondary side

Ask any questions relating to the PicoScope hardware or kit contents here.
If you have any questions prior to purchasing the kit post them here.
Post Reply
Pico User

Coil per cylinder - Secondary side

Post by Pico User » Tue Mar 23, 2004 8:04 am


I need to test a vehicle that has coils per cylinder.

I need to check the scondary output of the coils - are there any adaptors for this?

Or any work-around?



User avatar
Posts: 357
Joined: Wed Nov 20, 2002 4:19 pm
Location: Washington State USA

Post by Autonerdz » Tue Mar 23, 2004 3:48 pm

Hi Steve,

The kit does not include any Coil On Plug adapters to aquire a secondary pattern on COP. If the coil primary is externally driven you can get a primary voltage waveform which will work fine for spark and combustion analysis but will not show you the secondary firing kv. You can also use the included low amp probe to verify primary drive by capturing primary current..

To get Secondary on COP you would either need the adapters for that application, or fashion your own pickup, of sorts, out of tinfoil. Mold the tinfoil over the coil and form a 'handle' for the capacitive pickup. I have not played a lot with this but you should be able to get a secondary waveform. As with all such adapters, you may not pick up the full secondary kv.

Another alternative is to actually remove the coil and test the output with an adjustable spark tester.

Tom Roberts
(The Picotologist)

Post Reply