I've been dealing with a rough idle, cleared most of the problem by adding
"Sea foam" to the fuel to remove moisture.  Stopped engine lifter noise, by
adding "Sea foam" to the oil, prior to changing the oil.

Doesn't stall now, but still idles a little rough.  So, I tried pulling
spark plug wires to see if there was a cylinder missing.  When I pulled the
#3 wire, I received a jolt!

Does that indicate it is time to replace the wires?

If so, can anyone recommend the best option for a 91, 2.1L motor?

Thanks for your help!

Jack R.

84 Westy, with a 2.1L motor from a 91 Synco (60k original miles on motor).