1 spark from each coil

[Jonathan9586]

94 gsx600f that gets 1 spark from each coil,
I clipped the spark plug wires at both end to get fresh connection, I cracked open the crankcase sensor and it looks as though everything is in order. I spent 6 hours tracing every wire for bad connections and for corrosion. But when I flip flop the connections on the coil, the other plug Sparks and the one that did no longer does.

I am a newbie and this is my first bike, so I am not knowledgable. Please keep it simple stupid.

Please help, I get 3ohms across each coil when isolated, I am ready to replace both coils.

[92xjunker]

They are dual spark coils. Left coil is 1 & 4 right is 2 & 3. Did you replace the plugs? Are you saying that only ones side of the coil has spark?

[Jonathan9586]

They are dual spark coils. Left coil is 1 & 4 right is 2 & 3. Did you replace the plugs? Are you saying that only ones side of the coil has spark?

Plugs seen good, I didn't replace them. Bike was running good untill this all of a sudden.

I am using a tester plug that I clip onto the frame, I only get one spark from the coil when I hook the test plug to each of the boots, but when I swith the clip on leads (OW and BY) and flip flop them on the same coil the other plug starts sparking and the previous one stop.

[92xjunker]

Bad coils both should fire at the same time.

[Jonathan9586]

Do they go all of a sudden like this?

[92xjunker]

It's possible, they are old..

[Jonathan9586]

Do you recommend a certain kind?

[92xjunker]

Any 3ohm dual spark coil will work. I'd get the OEM coils, if it were mine.

[Jonathan9586]

Do you think it's a bad ground if I am still getting 3 ohms at the coils?