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Old 09-08-2005, 04:49 PM   #1
gavinl
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Member#: 57891
Join Date: Mar 2004
Location: Dublin, OH
Vehicle:
2005 9-2x Aero
Black

Default Coil pack ok?

Just tested my 97 OBS coil pack, here are the readings from the Multimeter:

primary terminals
1-2: 1.1ohms
2-3: 1.1ohms

Secondary terminals
1-2: 12.7k ohms
3-4: 12.89k ohms

The primary resistance seems a tad high compared to factory spec of .73ohms but not high enough to be open circuit. Is my coil pack ok?
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Old 09-08-2005, 06:26 PM   #2
t3hWIT
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Chapter/Region: MAIC
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95 STi RA (rhd)
98 Tacoma (300k Club)

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Not good with electricity. My question is, are you having a problem with it? Why did you perform the test?
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Old 09-08-2005, 07:12 PM   #3
2slofouru
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95 L with ej257k
powa, Raven R6

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If you subtract the resistance of the meter leads (.3 to .8 ohms), your readings will be within spec. But that doesn't mean the primary coil doesn't get overheated and have intermittent open circuit.
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Old 09-09-2005, 12:02 AM   #4
gavinl
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Reason I asked was I just mis-timed my 2.2 motor causing severe misfiring and bent valves. I'm wondering if during the misfiring might the coil been shorted out.
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Old 09-09-2005, 12:29 AM   #5
2slofouru
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powa, Raven R6

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That would not cause the coils to go bad.
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Old 09-09-2005, 06:42 AM   #6
kaisersouse
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2001 Forester S
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somewhat related: i noticed on my coil pack/distributor/whatever that 3 of the contacts were a nice bright gold, and one (#4 i think, the one on the rear-right if youre facing it) was oxidized. I cleaned it with a wire brush, but i read somewhere that its a sign of a bad coil pack.
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Old 09-09-2005, 08:48 AM   #7
Pat L.I.
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2006 WRX TR
Aspen White

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Quote:
Originally Posted by kaisersouse
somewhat related: i noticed on my coil pack/distributor/whatever that 3 of the contacts were a nice bright gold, and one (#4 i think, the one on the rear-right if youre facing it) was oxidized. I cleaned it with a wire brush, but i read somewhere that its a sign of a bad coil pack.
where did you read that? do you have any more information or a link?
here is my thread from a while ago. it never really got answered.
my car is in the shop right now, i asked them to look at the coil pack.

bad coil pack?
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Old 09-09-2005, 02:11 PM   #8
gavinl
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Hey kaisersouse, I also did notice my coil pack having a oxidize secondary terminal for cyl #1 after the car sent a cyl #1 misfiring error code. Cleaned that up and car was running fine till I f-ed up the timing belt and bent the valves.

Now I just wanna be sure that I have decent enough ignition parts to fire up a reman long block I just bought from CCR.
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