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      08-30-2012, 05:22 PM   #1
zltm089
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How often do you change spark plugs?

On a 335i....

How would i know if they need changing?

How often?

They were changed at 47k miles by bmw...


car is now on 58k miles...
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      08-31-2012, 03:08 AM   #2
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Kev,

They reckon tie it in with every 3rd oil change (assuming you follow extended 15-20k changes) so that's 45-60k.

If yours were done at 47, then thats about right, 90k for the next set!
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      08-31-2012, 07:09 AM   #3
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What doughboy said.

I got mine done at 5 years old and 38k miles.
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      08-31-2012, 08:15 AM   #4
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hmm...ok...

Just got some misfires and Cobb mentioned spark plugs and coils...

Need to find out whats wrong...Getting a bit annoyed that the Cobb maps are not working on my car...when the car runs perfect std...
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      08-31-2012, 08:29 AM   #5
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If you have a tune, change them every 25K miles. My car started misfiring around there,
Procede tuned.

Which cylinder?
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      08-31-2012, 11:24 AM   #6
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cyclinder 6....

what else might cause misfire apart from spark plugs and coils? ...

just worried its injector related?...
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      08-31-2012, 12:18 PM   #7
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Looks like you only have 11K on the plugs. hmm... I'd pull the #6 one out and compare it to the rest.
Coil packs are easy to check, swap the coilpack between two cylinders and see if the misfire changes with it.
Injectors are possible, but rare, especially if you have been through the injector/HPFP recall.

Good luck!
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Originally Posted by zltm089 View Post
cyclinder 6....

what else might cause misfire apart from spark plugs and coils? ...

just worried its injector related?...
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      08-31-2012, 04:16 PM   #8
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Quote:
Originally Posted by zltm089 View Post
cyclinder 6....

what else might cause misfire apart from spark plugs and coils? ...

just worried its injector related?...
Recent misfire on No3 cylinder, Tech changed all six plugs and six coil packs after checking his computer.
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      08-31-2012, 05:39 PM   #9
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Quote:
Originally Posted by greatbm View Post
Recent misfire on No3 cylinder, Tech changed all six plugs and six coil packs after checking his computer.
how much u paid for that mate?...

got the same errors over and over again...misfire on cylinder 6...
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      08-31-2012, 06:50 PM   #10
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Quote:
Originally Posted by zltm089 View Post
how much u paid for that mate?...

got the same errors over and over again...misfire on cylinder 6...
Mine was covered by BMW extended warranty at no cost at all, job was even done on my drive by the BMW Services Technician. I was surprised that they did not ask for some contribution as the spark plugs were due to be changed on service.
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      09-02-2012, 03:02 AM   #11
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Just curious I had my coils replaced under recall their recently, does that mean they would automatically do the plugs along with that or not?
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      09-02-2012, 05:13 AM   #12
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Quote:
Originally Posted by eddiem74 View Post
Just curious I had my coils replaced under recall their recently, does that mean they would automatically do the plugs along with that or not?
No, coils only - plugs not covered by the recall. If you feel they need changing, the recall is an ideal opportunity to get it done...
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      09-03-2012, 10:55 AM   #13
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there was a coil recall? I only know of the injector TSB...
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      09-03-2012, 11:39 AM   #14
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Quote:
Originally Posted by Transport3r View Post
there was a coil recall? I only know of the injector TSB...
I'm talking UK...may be different in the US.
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      09-04-2012, 12:05 PM   #15
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my plugs were changed in april... car says 60,000 miles to plug change
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