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Old 04-14-2011, 03:36 PM
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GM HEI distributor help with coil secondarys testing. makes no sense.

its a gm hei distributor computer controlled type.

When I was testing the coil I got .6 resistance between the BATT and TACH terminals. but when I touch the rotor button to the ground strap or the rotor button to the TACH wire It just says "1" on the meter. I don't understand this It's the same with 3 coils, 1 is new. I reused the rotor button and the ground strap. Can those 2 pieces somehow go bad somehow? This is bugging the crap out of me.

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Old 04-14-2011, 06:54 PM
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Quote:
Originally Posted by 0pyders
its a gm hei distributor computer controlled type.

When I was testing the coil I got .6 resistance between the BATT and TACH terminals. but when I touch the rotor button to the ground strap or the rotor button to the TACH wire It just says "1" on the meter. I don't understand this It's the same with 3 coils, 1 is new. I reused the rotor button and the ground strap. Can those 2 pieces somehow go bad somehow? This is bugging the crap out of me.
I dont know what .6 refers to but I'll assume its OHMS. The rotor button is made of carbon partly and thats a slight resistance. Its not truly metal to metal.
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Old 04-14-2011, 07:02 PM
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Not trying to be rude here but what is your point? I'm trying to figure out why I can't get a secondary resistance reading on a new coil.
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Old 04-14-2011, 10:41 PM
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Check out this thread on testing a GM HEI coil by Docvette (RIP). You sure the 1 is not an I? For Infinite? Do you have the meter set on the right scale? (just a thought). You can get the I with a dead meter battery too on some meters.

Testing HEI Coil/Module
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