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2010 2011 BMW 5 Series Forum F10 Software Update for F10 535 (N55) |
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10-19-2018, 12:38 PM | #1 |
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Software Update for F10 535 (N55)
Does anyone know if there is a software update that affects idle for the N55 engine? My car has been experiencing a weird idle dip shortly after startup for a few months now and I still haven't been able to get it sorted out. At first I thought it might have been worn/fouled spark plugs or a bad coil so I went ahead and replaced all 6 of each but that didn't fix the problem. I also thought it could be a problem with my BMS Stage 1 tune so I removed that as well but the problem persists. A mechanic at an indy shop suggested it could be the valvetronic motor failing, but another indy shop noted that a failed valvetronic motor will almost always throw a code and give a CEL (Check Engine Light). Anyone have any insight or experience something similar?
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10-20-2018, 01:02 PM | #2 |
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Based on the year I assume you have plenty miles on the car. Do you know if Fuel Injector service was ever performed on your vehicle? The N55 design and similar design engines will have carbon build up present unless cleaning is performed regularly (60-80k miles but all depends on driving). If it wasn't done, I suggest to do this. Second use some additives to the fuel to clean the injectors. Also check for vacuum leak but if one is present it will make idle to be bad even after a few seconds after starting it.
You are using Premium Fuel, right?
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10-21-2018, 07:39 PM | #3 | |
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10-21-2018, 07:48 PM | #4 | |
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10-22-2018, 04:03 PM | #5 | ||
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10-23-2018, 12:44 PM | #6 | |
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10-23-2018, 09:37 PM | #8 |
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Not as important on the N55 as it was on the N54. My dealer told me they don't do it on the N55 until they've exhausted all other avenues. BMW changed the "ventilation" on the N55 to correct the issue of carbon buildup on the N54.
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10-24-2018, 01:11 AM | #9 |
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It’s still happening on n55 and we are seeing it more and more. Doesn’t build up to the same amount as n54 tended to, but it’s still an issue on n55
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10-24-2018, 09:51 AM | #10 |
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As long as its direct injection there will be a need for walnut blasting regardless of what was improved over the n54. Direct injection will always cause build up on your intake valves, period. Only time you can probably stop worrying is if your car is running meth daily.
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10-24-2018, 12:50 PM | #11 |
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About how much does a walnut blasting service cost? I do lots of short trips so this could certainly be contributing to my issues.
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10-24-2018, 03:06 PM | #12 |
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Sure it would help, but it is only really NEEDED on N54's. N55's have nowhere near as much buildup. It's barely a film on N55's, I've heard of N54's looking like a clogged artery.
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