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Old May 1st, 2008, 12:44 PM   #1
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COP's


Alright, I am just trying to rule things out when it comes to my car not running right. So from some suggestions of some i did a resistance test on my COP's. my haynes book says that the primary resistance should be .5 ohms and the secondary resistance should be 5.5K ohms.

I used my ohm meter and got the following #'s on my COP's:

1P - .8
1S - 5.5K

2P - .7
2S - 5.48K

3P - .7
3S - 5.49K

4P - .8
4S - 5.48K

5P - .8
5S - 5.59K

6P - .8
6S - 5.43K

7P - .8
7S - 5.44K

8P - .8
8S - 5.45

so what do i gather from this?
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Old May 1st, 2008, 02:25 PM   #2
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did your haynes specify a range for them to be within? i know, or at least whenever ive had to deal with somthing like this, there was always a specific range for it to be within... not just one value, i would think those numbers reflect that your COP's are fine... i would think
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Old May 1st, 2008, 02:45 PM   #3
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They are all well within spec--however, a low voltage resistance test (usually less than 1.0V with a plain ol' digital multimeter) only verifies that there are no dead shorts. To really bench test the secondary you'd need a high-voltage tester.

What do you mean by "not running right", it sounds like you are trrying to track down a skip or miss?
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Old May 1st, 2008, 03:17 PM   #4
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for the 96-98 it gives a range, but for 99-04 it gives specific #'s .5 and 5.5K

and yeah, i am hunting down a problem.

car not finding it's idol (any help would be great)
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