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12-14-2012, 09:31 AM | #1 |
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New Spark plugs-wow
So I had my 30k service done and got the plugs changed, oil etc. I actually had changed the plugs myself at 10k miles as I had used some octane booster from torco which works but frys the plugs! So I changed them myself and drove 20k miles and when I took the car back it was so much more crisp and snappy acceleration. Was like the spark was not up to snuff and full combustion was not happening if that is possible.
I will definetly do more of a 15-20k spark plug change as it is a really easy DIY and worth keeping the engine in absolutely brand new functioning |
12-14-2012, 09:48 AM | #3 |
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12-14-2012, 10:24 AM | #4 |
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You are not alone. I had my plugs changed at 30,000 miles as well and felt a very noticeable difference!
Updating to this infamous 231E on the other hand, didn't notice a single thing.
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12-14-2012, 10:36 AM | #5 | |
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The Torco stuff is pretty good... Dave
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12-14-2012, 11:31 AM | #7 |
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Plugs on the s65 will wear faster then most because of the ion knock control on them. After each combustion firing 400VDC is ran through the plug when it is measuring combustion quality. Plugs and coils are going to be big wear items on the s65
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12-14-2012, 11:39 AM | #8 |
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How often do you think the coils need to be changed?
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12-14-2012, 12:02 PM | #10 | |
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They are damn expensive. $70 a piece.
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12-14-2012, 12:52 PM | #11 |
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Keeping on top of the plug will help the coils last longer. To how long the coils will last is a crystal ball question 5 more days or 5 years. Nothing not to sleep about just enjoy the s65 noise and keep it heathy
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12-14-2012, 01:48 PM | #12 |
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Mine were replaced at 28K miles under warranty. 46K on the clock now and still hitting all ignition targets set and running better than ever.
I'll probably let BMW change them around 58K under the extended maintenance contract I purchased. Along with rotors, pads, brake fluid, oil, micro-filter, tranny oil, diff oil, and clutch if I can be convincing enough And yeah... tires too somewhere in there. Mine took a beating at the track a few days ago.
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12-14-2012, 09:31 PM | #14 |
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12-15-2012, 11:37 AM | #16 | |
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Wonder if someone can explain why a fresh set of plugs can make such a difference? |
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12-15-2012, 01:04 PM | #17 |
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It's the knock system in how it reads pike cylinder pressure while applying 400vdc after combustion it's reads resistance to see if detonation is happening. So a old plug bigger gap maybe the fuel additive add to more initial resistance thus the ecu pulling power thinking detonation is forming. Just my two cent.
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12-15-2012, 04:08 PM | #18 |
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I think you can find them on amazon from NGK for like $11 each. It's what they were using on the DIY thread.
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12-15-2012, 06:38 PM | #20 | |
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The combustion quality detection is a function of the coils themselves and the feedback received from the plugs.
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12-16-2012, 08:35 AM | #21 |
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12-19-2012, 02:54 PM | #22 |
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My car is at South Bay BMW for a oil change and replacing the driver side parking and DL. Turns out at 26k miles on my car they are changing the spark plugs and doing a diffy service.
Dave
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