From my '87 (Prices include shipping):

(2) Distributor Caps, $40 Each
(2) Rotors, $30 Each
(2) Ignition Coils, $25 Each

Pics to follow.

 

Any warranty that they still meet the resistance valves (ohms) provided by the WSM for distributor caps, rotors, and coils?

Did you check this before replacing them, or just replaced cause you didn't know how to test them?

 

I would be interested in coils if tested good.

 

Didn't know I could test them. I'm making my car more concourse and replacing parts that don't look perfect.

I'll test them, just tell me how. Price would probably go up then.

 

FWIW you can take the dist caps apart,
and scrub them with soap and water,
they will look new when your finished

 

Pics of the parts at hand. Again, teach me to fish and how to test them, been searching and haven't found it.

 

Iffy to buy old electrical parts. I guess if cheap enough they could be used as spares.

 

Sounds like a good pay it forward.

 

Tested the coils and on my multimeter at the 200 ohm position they both read 1.1 for the first winding and my tips aren't long enough to check the second winding without taking them apart.

 

Bump

 

Caps wear at the center contact to the rotor, and there may be arcing damage to the individual cylinder contacts inside. As suggested, you can wash them with soap and water, dry them and they will be good as they were on the car. Look for cracking in the caps. Resistance through the wire connections should be zero ohms.

Rotors wear at the tips with arc flash damag. If they are clean there, do the same wash-and-dry and they are fine if not cracked.

Coils are a crapshoot. If they worked when removed that are likely fine. They get damaged if run while the wires are damaged or there are big gaps in the cap/rotor junction, the coil wire comes loose or fails internally. Higher firing voltage from those problems may cause internal arcing in the secondary coil, but you'd know that because the car won't run right. Don't drop them. The ohm meter test is a good start. You can use a paperclip to reach the center secondary connection. A common ohm meter will not test faulted coil insulation though, just continuity in the winding.

 

WSM Volume 1A, Section 28 (page D28-14) covers testing final stage ignition components for the later model cars (S4/GT/GTS).

For the coils, the primary resistance: 0.4 - 0.7 ohms, secondary resistance: 5,000 - 8,700 ohms. Both measurements should be taken across terminal 1. For installed coils, there is also a primary coil voltage check at idle.

Rotor suppressor resistance: 1,000 ohms

For restoration or cap and rotor, you can polish the contacts and other surfaces with 2000 grit sandpaper.