99 coil pack problem, my baby needs help!!!
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Donating Maxima.org Member
Joined: Jun 2003
Posts: 384
99 coil pack problem, my baby needs help!!!
i have strong a suspicion that one of my coil packs maybe bad, since i'v read that the '99s have this problem around 80,000 and i'm pushen 83k miles right now.
my car feels likes its misfiring right around 3-4k rpm range. I'v check each plug and they all look about the same
what can i do to test the coil packs, can i use an ohm meter to find the bad one??
thanks in advance for the help
also, it doesn't happen all the time, only under hard throttle, and i'v changed my knock sensor but it didn't help my problem much, just improved gas milage.
my car feels likes its misfiring right around 3-4k rpm range. I'v check each plug and they all look about the same
what can i do to test the coil packs, can i use an ohm meter to find the bad one??
thanks in advance for the help
also, it doesn't happen all the time, only under hard throttle, and i'v changed my knock sensor but it didn't help my problem much, just improved gas milage.
Member
Joined: Mar 2004
Posts: 95
If your CEL comes on bring the car to autozone/shop and get them to check for codes/ Hopefully it'll tell which coil/cylinder is causing the misfire then you can change just that one. If your unlucky ECU won't tell which one is the culprit and you may have to change all 6! Here is how to test em on your own, not the best way but worth a shot.
To Test Ignition Coils:
With the ignition off, disconnect the electrical connector from the ignition coil. Connect the positive (+) probe of an ohmmeter to terminal no. 1 and the negative (-) probe to terminal no. 2 of the coil connector - the meter should indicate infinite resistance. Reverse the meter leads ( negative probe to terminal no. 1 and positive probe to terminal no.2) - the continuity should be indicated, but not zero ohms. If the results are not as specified, replace the coil.
Connect an ohmmeter between the secondary terminal ( the one that the spark plug connects to) and terminal no. 1 - the meter should indicate infinite resistance. If not, replace the coil.
Note - Ohm meter to test coils is not the most reliable way. Some peoples’ coils tested perfectly, but they still misfired
To Test Ignition Coils:
With the ignition off, disconnect the electrical connector from the ignition coil. Connect the positive (+) probe of an ohmmeter to terminal no. 1 and the negative (-) probe to terminal no. 2 of the coil connector - the meter should indicate infinite resistance. Reverse the meter leads ( negative probe to terminal no. 1 and positive probe to terminal no.2) - the continuity should be indicated, but not zero ohms. If the results are not as specified, replace the coil.
Connect an ohmmeter between the secondary terminal ( the one that the spark plug connects to) and terminal no. 1 - the meter should indicate infinite resistance. If not, replace the coil.
Note - Ohm meter to test coils is not the most reliable way. Some peoples’ coils tested perfectly, but they still misfired
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ballerchris510
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Sep 11, 2015 05:29 PM