Coil to distributor wire resistance (1 Viewer)

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

middlecalf

SILVER Star
Joined
Jul 20, 2004
Threads
68
Messages
5,650
Location
Sweet, Idaho
For you folks still running points, what should be the resistance of the primary wire between the coil and the distributor? Can’t find anything specific in the engine repair manual, but Dr. Intell (google 😂) says maybe an ohm or two at most. Just wondering if Toyota uses a higher resistance wire for some purpose, my existing one that’s 6-7 yrs old is measuring ~3.5k ohms. I’m checking this because my rig won’t turnover suddenly. (I’ll check my other rig’s wire but it’s an SBC with a DUI)
 
Stupid is that stupid does 😂. A DUI doesn’t have a coil-to-dizzy wire 🙄. So no comparison there.

But I measured the #3 and #6 spark plug wires, and they were ~3k and ~6k ohms, respectively, which is good relative-wise since #6 is ~2x in length of the #3 wire. And #3 is a smidgeon shorter than the coil-to-dizzy wire. So all that looks good relatively considering they all came from a good Toyota designated kit. Defunct coil is now at the top of the guilty list (even with good primary and secondary resistances) as I’m not getting any spark at any plug. That happened the last time my coil died.
 
Last edited:
Won’t fire up and run. It turns over, all fuses good. Has 12.8v+ at the + coil terminal with ignition on.
 
And if you put an ignition lead onto a spare spark plug and ground it to the head, you get a nice healthy blue spark while cranking?
Ignition lead from where, coil?
 
Last edited:

Users who are viewing this thread

Back
Top Bottom