Ignition Coil Question

[fallingat120mph]

1986 3.2l here...

So, I have an 1986 that was written off after an accident. That car has been in storage and I am swapping out bits and pieces with my current daily driver. The one in storage has/had 65,000 miles and the daily driver has over 200,000.

I have been doing a lot of work to the daily driver and chasing leaks, adjusting valves, testing electronics...etc.

So, as part of a chasing an idle issue, today I pulled the ignition coil from the 200,000 mile car and compared it to the 65,000 mile car.

Photos below:


No cover and 200,000 miles later:




Stored and well maintained 1 owner with cover/cap and 65,000:



Reading through threads I found this (Hope terminology is correct):

A good coil should have 0.2~0.7 ohms resistance on the primary side.
A good coil should have 4,500 ~ 9,000 ohms resistance on the secondary side.


So both mine tested at:

.5 on the primary side, and 5.63 (200,000miles) and 5.82 (65,000miles) on the secondary side.

My question would be is that difference significant (5.63 v 5.82)? AND...is it possible, if the numbers aren't significant, that one can just be worn out?


I am narrowing things down with my idle and I am at this stage with the coils. Car is lifted right now as I am finishing up valve adjustment and new fuel pump. I will swap out coils when I can but for the technical side I was curious about these numbers and what a "bad coil" would show vs a "good" coil...if good and bad can even be measured in this manner?



Hope this makes sense. Thanks in advance!



Erik

[porschedude996]

Insignificant value. Should be fine.