View Single Post
      05-08-2021, 08:24 AM   #8
Billfitz
Lieutenant General
Billfitz's Avatar
United_States
8170
Rep
15,966
Posts

Drives: '15 328iX GT
Join Date: Jan 2015
Location: New Hampshire

iTrader: (0)

Quote:
Originally Posted by Wires View Post
Resistance won't help you if the insulation is breaking down in the coil, and they are arcing under use.
If the insulation is breaking down there will be leakage from winding to winding, which would be seen as lower resistance than normal. Misfires can be caused by other factors as well, so if you have misfires doing a resistance test of the coils would help to confirm or rule them out as a potential cause. I haven't come across the exact primary/secondary values, but the primary resistance is listed as less than 600 megohms, with the primary to secondary resistance ratio being 1:80.
Appreciate 0