Can an N.O.S. Ignition coil go bad

[Joseph C.]

I recently purchased an N.O.S.ignition coil for our 1965 Corvette. Can a coil go bad just from age sitting in a unopened box. I now realize I should have asked this question before buying. Stupid me. Thanks, Duke

[Harry S.]

Re: Can an N.O.S. Ignition coil go bad

I guess new defective is possible. What is happening to make you think it's bad?

[Joseph C.]

[Larry M.]

Re: Can an N.O.S. Ignition coil go bad

It should be fine. You can test it before installation. Chevrolet Service has the specs. It requires an Ohm Meter or Multimeter.

Or just install it and start the car.

Larry

[Harry S.]

Re: Can an N.O.S. Ignition coil go bad

To test, in case you have one of these.

The secondary winding of your ignition coil	087 OEM	087 reproduction	202 OEM
	Ohms	Ohms	Ohms
Primary Winding	1.8	2.4	2.2
Secondary Winding	7.9K	11.71K	14.46K

[Joseph C.]

Re: Can an N.O.S. Ignition coil go bad

Thanks to everyone for your time and fine answers. Your knowledge is truly appreciated, Duke

[Guest]

Re: Can an N.O.S. Ignition coil go bad

Joseph, i been through at least 5 repro. coils before i got a good one , it's a hit and miss even if you check the coil's primary and secondary winding are in proper Ohms specs. there made in China and box in U.S Delco box's it start the car after running for a couple hours or less the car start acting up and coil start getting hot and breaks down.

[Joseph C.]

Re: Can an N.O.S. Ignition coil go bad

Hi DANNY,
The one in the car is a repro GM authorized Chinese piece. So far it has worked okay. The one I ordered is a genuine N.O.S. coil in a sealed GM box. Your thoughts on the Chinese is why I ordered an NOS piece. Thanks for sharing your thoughts, Duke

[Jim D.]

Re: Can an N.O.S. Ignition coil go bad

I and several others I know have had the same issues as Danny did with the Chinese made reproduction coils.

[Joseph C.]

[Harry S.]

Re: Can an N.O.S. Ignition coil go bad

It sounds to me that he has a NOS Delco in a sealed box with a string.

[Ed D.]

Re: Can an N.O.S. Ignition coil go bad

Hey Duke,
I think that the primary reason that coils fail, is due to vibration and heat cycles. That said I know of many bad coils that fail out of the box, which I believe is manufacturing defect.
Ed

[Edward B.]

Re: Can an N.O.S. Ignition coil go bad

Failure rate for NOS coil will be a lot less than the stuff being made today. It's a real test of one's diagnostic skills to replace what you believe to be a bad electrical part with a new one from the box and have the problem persist. Replace it with another new part, experience the same problem and you're really scratching your head. Unfortunately, today it's not uncommon to go through several new coils, relays, etc., before finding one that works. QC on the offshore electrical replacement components is awful.