1980 gs1000

[Guest]

My #2 and #3 cylenders are going dead off and on. It has an electronic ignition, no points can someone tell me the most likely thing that could make this happen. They seem to be going off at the same time and back on...... Every time I think I'm done something else happens.

[Guest]

Have you replaced the coil?
Checked the connection on the #2 and #3 coil?
Is the igniter good?
I would start with the coil. Swap coils and see if the same happens to the #1 and #4

[Guest]

coils

I unplugged the right coil lead and plugged it into the left and left into right. No spark anywhere, doe's that sound right?. I switch them back and it had spark again. It started right up and ran like new. When riding down the road the 2 and 3 cylinders drop out and pop back in like a switch is being flipped off and on.

[KiwiGS]

You need to make sure that you have 12 ish volts at the small plug for the coils.
It sounds like you have a rooted coil pack though....

[Guest]

If you switched the connections going into the coils (under the tank) and you lost all spark there is something else going on. You should of just reversed the problem from 2&3 to 1&4.
Got a manual? Check the signal generator at the crank and the igniter.

[Spyderman]

might want to check for a bad ground too and or a loose connection that is rattling and causing your problem as you go down the road

[Guest]

Igniter ? I have a manual

I don't remember checking the igniter. I guess I had spark to everything so I assumed it was good. I did check the Sig. generator it was good. But, yep if I switch the wire plugs from the wire loom to the plugs on the coil under the tank I get no spark anywhere. Switched back and its fine. But I have not ridden farther than around the block a few times.