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Old 12-01-2011, 02:43 AM
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Replace 1 or 4 Ignition coils

35K miles ago I replaced all four ignition coils on my 2002 Altima 2.5S. One of the coils just went bad.

Should I replace all four coils again or can I replace just the one bad one?

The original coils lasted 90K miles. The news one had a failure after 35K miles. Could the be something causing this shorter life, such as a bad ground cable from the battery to the chassis?

Last edited by swieder; 12-01-2011 at 02:45 AM.
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Old 12-01-2011, 02:01 PM
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Odd situation this morning. My local Carquest has 1 coil in stock which I bought. I replaced the coil in cylinder one and was still getting a P0301, misfire on on Cyl 1 code. I moved the new coil to cylinder four and the code changed to a P0304, misfire on Cyl 4.

This made me conclude that the new ignition coil was defective. I also noted that the new coil did not seat as snuggly on the spark plug as the existing coils. Carquest is getting me a new coil which they will have a 3:30 (EST) today.

Any suggestions on why the new coil would not fit as snuggly as the existing one? Could it just be defective or is something else amiss (pun intended)?
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Old 12-01-2011, 03:16 PM
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Originally Posted by swieder View Post
Odd situation this morning. My local Carquest has 1 coil in stock which I bought. I replaced the coil in cylinder one and was still getting a P0301, misfire on on Cyl 1 code. I moved the new coil to cylinder four and the code changed to a P0304, misfire on Cyl 4.

This made me conclude that the new ignition coil was defective. I also noted that the new coil did not seat as snuggly on the spark plug as the existing coils. Carquest is getting me a new coil which they will have a 3:30 (EST) today.

Any suggestions on why the new coil would not fit as snuggly as the existing one? Could it just be defective or is something else amiss (pun intended)?
When it comes to electronics on this car, I just go with OEM stuff. You can find plenty of issues with people using after market electronic parts on this car, e.g., sensors vs. just buying the OEM version.
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Old 12-01-2011, 03:41 PM
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Are the OEM coils Denso's or not? Just asking.
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Old 12-02-2011, 12:40 AM
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When it comes to electronics on this car, I just go with OEM stuff. You can find plenty of issues with people using after market electronic parts on this car, e.g., sensors vs. just buying the OEM version.
OE parts generally are made by aftermarket manufacturers anyway, such as Denso as mentioned. I've sold aftermarket sensors for years, many of them for Nissan's, without issue. OE parts doesn't really mean a whole a lot, except you generally pay a bunch more for a part that carries the same warranty.

To each their own though. It's all about what makes you comfortable.

*edit* Off topic - Riz, I like the tree hauler!
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Old 12-02-2011, 12:54 AM
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OE parts generally are made by aftermarket manufacturers anyway, such as Denso as mentioned. I've sold aftermarket sensors for years, many of them for Nissan's, without issue. OE parts doesn't really mean a whole a lot, except you generally pay a bunch more for a part that carries the same warranty.

To each their own though. It's all about what makes you comfortable.

*edit* Off topic - Riz, I like the tree hauler!
Yeah I know everything is outsourced these days. I know in most industries, things are sometimes designed in-house, then the manufacturing of parts is usually outsourced to the lowest bidder. The only reason I recommend OEM for sensors or electrical parts is because things, such as sensors have changed and some stores still carry the older versions, or sometimes the fitment of aftermarket parts is off a little bit compared to OEM. They may work, but require a little bit of adjustment.

Anyway, I buy aftermarket for MOST things, especially since it's usually more reasonable compared to OEM parts in pricing. There are however times, when aftermarket quality sucks worse than OEM.
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Old 12-02-2011, 01:25 PM
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*edit* Off topic - Riz, I like the tree hauler!
Thanks Mike! Long time man...Hope all is well up there - and that you have a GREAT holiday...
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Old 12-02-2011, 01:27 PM
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Since you come across parts quite a bit Mike, who makes the OEM coil packs?
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Old 12-02-2011, 02:21 PM
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Thanks Mike! Long time man...Hope all is well up there - and that you have a GREAT holiday...
Thanks, eh! All is well and same to you.

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Since you come across parts quite a bit Mike, who makes the OEM coil packs?
Hitachi is OE in the case. That's not readily available in the aftermarket. There are a few places that can get into it, but not many.
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Old 12-02-2011, 06:58 PM
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Thanks, eh! All is well and same to you.



Hitachi is OE in the case. That's not readily available in the aftermarket. There are a few places that can get into it, but not many.
A good deal of the electronics used on Nissans are built by Hitachi. As Mike stated, there are a few places that can get the OE part...Worldpac comes to mind.

CarQuest bought out Worldpac a few years back when I was still involved with CarQuest, so any of their stores should have access to the parts.
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Old 12-02-2011, 09:00 PM
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^^yup, worldpac has it. I'm not a worldpac fan, but they do have a few things that are tricky to find.
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