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Can anyone tell me what the resistance should be when measuring between the plunger in the distributor cap that contacts the rotor and the screw that attaches the coil wire? I have several distributor caps and it seems they all have different resistances when measured at this location, differences being from tens of ohms to thousands of ohms. What's correct?
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TR2/3/3A Distributor Cap resistance
- Thread starter BobbyO
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I've noticed that too, with other cars; some caps have a fairly high resistance, and some next to nothing. It's surprising.
Given that resistor ignition wires have something like 10,000 ohms of resistance, I wouldn't worry about even a few thousand in the distributor cap.
Given that resistor ignition wires have something like 10,000 ohms of resistance, I wouldn't worry about even a few thousand in the distributor cap.
Thanks Steve. Hadn't thought about the resistance of resistor ignition wires. Have a local friend with a '62 TR3B so I measured his and it was around 28 ohms so I'm using the cap with about the same although I have three others that measured in the 10-12K ohm region and one that is in the 200 ohm area.
