Spark plug wire resistance OK?

[e9999]

Here is what I measured on my plug wires, from 1 to 6, in kiloOhms

7.5
8.75
12.6
11.8
15.7
17.1

Bible says should be 25 max.
So am I in great shape there since it's less than 25 or do these numbers suggest that I would be much better off changing them if only for mileage's or roughness sake? Anybody else has numbers for new ones for comparison?
These are the original wires ('97) btw.

Thoughts?

 

[concretejungle]

Good question and how did you test? Just stick the meter into the plug cap and crank on the engine?

 

[Josh83]

Good question and how did you test? Just stick the meter into the plug cap and crank on the engine?

Resistance would be measured by setting your meter to resistance and putting a lead in each end.

 

[e9999]

Good question and how did you test? Just stick the meter into the plug cap and crank on the engine?

just used the multimeter connected to both ends of the wires. No, no cranking. Wiggled the connectors plenty and it always gave me the same answer so I'm pretty confident the numbers are OK.

 

[IdahoDoug]

Eric,

At 103,000 miles I put new OEM wires on mine and then checked the old wires out of curiousity. They were all well within spec just as you found. I was trying to completely eliminate a *slight* idle roughness and there was no change in the way the engine ran with the new wires. Had I checked before ordering the wires I think they'd still be on it now. I'd keep running them. Barring any physical stress on these high quality wires (tugging, bending, overheating, etc), I suspect they'll run a VERY long time. I recall a similar pattern of higher resistance the longer the wire was, which I attributed simply to the slightly greater resistance of more wire.

DougM

 

[e9999]

Eric,

At 103,000 miles I put new OEM wires on mine and then checked the old wires out of curiousity. They were all well within spec just as you found. I was trying to completely eliminate a *slight* idle roughness and there was no change in the way the engine ran with the new wires. Had I checked before ordering the wires I think they'd still be on it now. I'd keep running them. Barring any physical stress on these high quality wires (tugging, bending, overheating, etc), I suspect they'll run a VERY long time. I recall a similar pattern of higher resistance the longer the wire was, which I attributed simply to the slightly greater resistance of more wire.

DougM

Well, they all look to be the same thickness on the outside and the #6 is about twice as long as #1 so that's consistent with the resistances I saw.

they are really very thin. Interesting... This must be awfully high voltage seeing how they take great pains to arrange the wires on these supports in a specific order etc...