You really have to be careful with carbon (resistance) wires. You can NEVER pull on them. It take very little force on them to break the carbon inside. An old mechanics trick to see if you have a breakdown in the high tension side of the ignition system is to get a small portable radio. Set it on AM in between stations. Hold it near the motor when running. If you hear a lot of noise (ticks) then you might have sparks jumping somewhere that you might not even see like inside the wire jacket or in the spark plug well. Another old trick is to run the motor in the dark and WITH YOUR HANDS IN YOUR POCKETS look over the motor at the cap, ignition wires and spark plug wells. If you see a blue glow or sparks jumping around you have to replace the ignition wires, cap, rotor, etc. BE CAREFUL, you are dealing with a lot of voltage. If the shock doesn't injure you it could cause you to pull your hand back and damage it on a sharp edge or if you jump back you could fall and hurt yourself. The resistance on suppression wires varies with the length of the wire. They are not all the same length so they WILL vary in resistance. I forgot the rule of thumb for the resistance per foot. Never pull on the wires to remove from the spark plugs. You should pull on the boot with a twisting motion. Inspect for cracks and hardness, the wires should be flexible. Any cracks or hardness indicates a spot where the electric was arcing out of the wire. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "John Hervey" <john@xxxx> wrote: > Group, I checked the resistance on 3 sets of spark plug wires this > weekend and found a big difference. The resistance was measured with > a B&K Multimeter in the $100.00 varity and was from end connector to > end connector. > > Set#1. AutoZone, Omnispark. 7mm. All wires were around 5 to 6 thousand > ohms, which is fine for normal driving and RFI suppression. > ( Radio interference.)But a little high. >