# Ignition Coil Resistance ?

**URL:** <https://forums.speedlife.net/t/ignition-coil-resistance/34790>\
**Category:** NYSpeed Automotive\
**Created:** [September 3, 2007, 12:50pm UTC](https://forums.speedlife.net/t/ignition-coil-resistance/34790 "2007-09-03T12:50:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jetlounge](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jetlounge/32/4994_2.png) [@jetlounge](https://forums.speedlife.net/u/jetlounge)\
**Post date:** [September 3, 2007, 12:50pm UTC](https://forums.speedlife.net/t/ignition-coil-resistance/34790/1 "2007-09-03T12:50:11Z")

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Trying to rule out ignition coils for my hard cold starts.

I found a site that says “most” automobile coils should be .75 - .81 ohms on the primary leads and 10k - 11k on the secondary.  
If i read my meter right this one is telling me my coils are between .375 and .368 on the low and between 23.75k and 24K on the high on a cold engine.

Either i am measuring incorrectly, the general spec is wrong or the coils are bad?

Does anyone know the acceptable range of resistance on the ignition coil on a scion tc. This is a 2az-fe which has been used in the toyota camry for a bazillion years. Ignition coil is a Denso 90919-02244