Faulty Ignition Coil?

[Raulmanny50]

it looks like there is no spark on my no. 1 cylinder. No. 3 is working well. It is possible that the ignition coil is not good? I'll exchange the plug wire and see if is OK.

[koolaid_kid]

Would this be on a motorcycle? A Suzuki motorcycle? Possibly a GS motorcycle?
Model, year, displacement, things like that probably help.
If you put them in your signature, it would help everyone, including yourself.

[tom203]

More likely the plug cap- 30 yearold ones are stubborn sometimes.

[tkent02]

If it has three cylinders, it may have four. If it's a four cylinder Suzuki the #1 and #4 share a common coil, if four works one probably does too.
Fix the plug caps.

[koolaid_kid]

The same is true for Kawasakis, 1 & 4, 2 & 3.

[BassCliff]

Hi,

How did you test? Check my little website for how to change plug caps and perform ignition/electrical troubleshooting. Keep us informed.

Thank you for your indulgence,

BassCliff

[Raulmanny50]

My BAD!
Suzuki GS650G, 1981, 31K.

[koolaid_kid]

I haven't seen Cliff's testing of the coils, wires and ignition, but he always has good information, so I would start there. And thanks for the info.

[tom203]

With tank off, unplug ignition coils (disconnect spade connectors)- with a decent multinmeter measure ohm resistance across the the spade connectors on the coil- should be about 4 ohm. Now remove plug caps from plug wires; then measure resisitance between these two wires- should measure about 12 kohm.