Cylinder Misfires

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whiner - 05 Apr 2005 22:00 GMT

I have a 99 Maxima that had a code indicating that there was
a cylinder misfire on #6. As a quick fix, I replaced all the
plugs since they have 55K miles on them. The car seems to
running rougher than before.

Lo and behold, today the check engine light lit again.
This time it indicates a cylinder misfire on #5.

Any suggestions?

BTW, how are the cylinders numbered?

x x x

x x x

front

Any help would be greatly appreciated.

Thanks.

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Dave Stone - 05 Apr 2005 23:42 GMT

"whiner" <sherry.jg@gmail.com> wrote in news:1112734813.234256.182180
@g14g2000cwa.googlegroups.com:

> I have a 99 Maxima that had a code indicating that there was
> a cylinder misfire on #6. As a quick fix, I replaced all the
[quoted text clipped - 17 lines]
>
> Thanks.

Did you replace the plugs with NGK? Otherwise it could be one or more of
the ignition coils going bad.

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NissTech - 06 Apr 2005 00:04 GMT

make sure you used NGK plugs.

Get the code read , chances are you will have a P1320 (primary ignition
signal) code along with the missfire code P0306.

you probably have a bad coil

cylinders 1 3 and 5 are closest to the firewall
2 4 and 6 are up front, closest to the radiator

> I have a 99 Maxima that had a code indicating that there was
> a cylinder misfire on #6. As a quick fix, I replaced all the
[quoted text clipped - 17 lines]
>
> Thanks.

Reply to this Message

whiner - 06 Apr 2005 01:05 GMT

Why is everybody pushing NGK plugs?
What is so special about them?

I used Bosch Platinum 2 plugs. Is it worth
replacing these new ones with the NGK?

I know the code were P1320 and P0306 the first and second time
but on the third time, the codes were P1320 and P0305.
If it was a bad coil, how could it move?

Just as a note, I only disconnected one coil at a time to ensure
I didn't mix them up.

> make sure you used NGK plugs.
>
[quoted text clipped - 27 lines]
> >
> > Thanks.

Reply to this Message

Dave Stone - 06 Apr 2005 01:55 GMT

"whiner" <sherry.jg@gmail.com> wrote in news:1112745915.502849.244170
@g14g2000cwa.googlegroups.com:

> Why is everybody pushing NGK plugs?
> What is so special about them?
[quoted text clipped - 8 lines]
> Just as a note, I only disconnected one coil at a time to ensure
> I didn't mix them up.

Take a look the general consensus:

http://groups-beta.google.com/group/alt.autos.nissan/search?q=ngk+bosch+-
stone&start=0&scoring=d&

You will find most people prefer the NGK plugs vs other brands for a
variety of reasons. The most important being its what Nissan uses from the
factory and recommends as replacement.

Reply to this Message

NissTech - 07 Apr 2005 02:31 GMT

> Why is everybody pushing NGK plugs?
> What is so special about them?

NGK's are the plugs the vehicle was designed use.

> I used Bosch Platinum 2 plugs. Is it worth
> replacing these new ones with the NGK?

yes

> I know the code were P1320 and P0306 the first and second time
> but on the third time, the codes were P1320 and P0305.
> If it was a bad coil, how could it move?

nothing moved, the first set of codes was telling you that cylinder 6
had/has a missfire do to a bad coil, the coil should have been replaced with
a new one.

The second set of codes told you the same thing about cylinder number 5

This is what you need to do to fix it.

1. install the correct NGK spark plugs, not Bosch, or Autolite or Champion
use NGK !
2. replace all the coils or replace them one at a time as the go bad

> Just as a note, I only disconnected one coil at a time to ensure
> I didn't mix them up.
[quoted text clipped - 31 lines]
> > >
> > > Thanks.

Reply to this Message

Steve T - 07 Apr 2005 03:27 GMT

> Why is everybody pushing NGK plugs?

Because they work the best.

> I used Bosch Platinum 2 plugs. Is it worth
> replacing these new ones with the NGK?

Lets see, you installed NEW bosch platinums, the car runs WORSE and you have
to ask this question?

Signature

Steve

http://www.atlantaracing.com

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