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Range on coil measurement values?
Posted: Sat Feb 28, 2015 1:07 pm
by refit1701
I found an original Autolite coil for my truck. The + and - terminals measure 12 ohms. I have seen somewhere that it should be around 1 ohms. Do I have a bad coil? The center to positive is 14K ohms.
Re: Range on coil measurement values?
Posted: Sat Feb 28, 2015 1:34 pm
by Carter
On the primary side you should have 6 Ohms, on the secondary side you should have 14.5--15k Ohms.
Re: Range on coil measurement values?
Posted: Sat Feb 28, 2015 2:38 pm
by refit1701
So, 12 ohms is bad or going bad. I'm currently running a Chinese coil and feel like it is a ticking time bomb. We sure could use some reliable new coils for the hobby.
Re: Range on coil measurement values?
Posted: Sat Mar 28, 2015 9:06 am
by cuz
Find a shop with a real coil tester and check it out correctly. The primary & secondary Ohm readings will give you an idea on condition but the more reliable method is with a Coil & Capacitor test set. Also when taking the ohm readings be sure take both readings with the coil both cold and hot. Heat it with a heat gun or hair dryer until it is uncomfortable to tough.