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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Misfire detected (no cel)

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      10-20-2021, 06:34 PM   #1
gsm2x3
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Scanned with bimmerlink today for the hell of it. No CEL Found misfire codes. (Attached) car feels completely fine. Any idea why the codes? Stock tune. Catless FI downpipe, vrsf chargepipe
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      10-21-2021, 01:23 AM   #2
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Check the air box, and make sure it’s sealed and MAF is seated (you can clean it just to make sure)

You should also make sure the coils are seated properly, but it could also be (without seeing a log) a boost leak
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      10-21-2021, 01:08 PM   #3
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Quote:
Originally Posted by AmuroRay View Post
Check the air box, and make sure it’s sealed and MAF is seated (you can clean it just to make sure)

You should also make sure the coils are seated properly, but it could also be (without seeing a log) a boost leak
Thanks, I checked the connections. Everything looked ok. Gonna log a bit and post later
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      10-21-2021, 03:53 PM   #4
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Attached a log. Did a few hard pulls. This was 3rd gear at 2500. No new codes. Car felt fine. I don't see anything jumping at me however I'm not super familiar with all the data.
Thanks for having a look

https://datazap.me/u/gstraube/log-16...-16&solo=4
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      10-21-2021, 07:05 PM   #5
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- Timing looks consistent
- Boost reaching target
- Don’t see any HPFP data or much else. Data is limited.

I’ve never scanned for any codes with BimmerLink but now I want to.
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      10-21-2021, 08:02 PM   #6
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Quote:
Originally Posted by WolfmanÂ’s Brother View Post
- Timing looks consistent
- Boost reaching target
- Don’t see any HPFP data or much else. Data is limited.

I’ve never scanned for any codes with BimmerLink but now I want to.
[QUOTE=WolfmanÂ’s Brother - Don't see any HPFP data or much else.[/QUOTE]

I think you can click on the different parameters under the chart to make them show
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      10-22-2021, 07:47 AM   #7
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Can you clear them and see if they come back? Is there any indication of when the codes where thrown?

The parameters you logged are limited, but timing which is one of they key values is there and seems fine.

Get BootMod3 and an intercooler, flash stage 1 and you can log more values while enjoying a safe, mild bump in power.
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      10-22-2021, 08:50 AM   #8
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Quote:
Originally Posted by WolfmanÂ’s Brother View Post
Can you clear them and see if they come back? Is there any indication of when the codes where thrown?

The parameters you logged are limited, but timing which is one of they key values is there and seems fine.

Get BootMod3 and an intercooler, flash stage 1 and you can log more values while enjoying a safe, mild bump in power.
Yes I cleared them and so far so good. And being that they didn't actually cause a CEL I'm not terribly concerned. I more so was just being a little on the precautionary side, making sure things were ok before I did flash a tune. I do plan on tuning come spring time with either MHD or BM3. Thanks for the responses 🍻
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      10-25-2021, 08:35 AM   #9
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Quote:
Originally Posted by gsm2x3 View Post
Attached a log. Did a few hard pulls. This was 3rd gear at 2500. No new codes. Car felt fine. I don't see anything jumping at me however I'm not super familiar with all the data.
Thanks for having a look

https://datazap.me/u/gstraube/log-16...ta=4-16&solo=4
Quote:
Originally Posted by Wolfman’s Brother View Post
- Timing looks consistent
- Boost reaching target
- Don’t see any HPFP data or much else. Data is limited.

I’ve never scanned for any codes with BimmerLink but now I want to.
I'll echo the comments above - The load control looks good, boost is fine, throttle is dropping out though, did you have the traction control on? - nothing stands out.

And Fuel pump pressure is on there, and it's fine. I wouldn't expect to see any issues on a stock tune.
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      10-25-2021, 10:20 PM   #10
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Quote:
Originally Posted by AmuroRay View Post
Quote:
Originally Posted by gsm2x3 View Post
Attached a log. Did a few hard pulls. This was 3rd gear at 2500. No new codes. Car felt fine. I don't see anything jumping at me however I'm not super familiar with all the data.
Thanks for having a look

https://datazap.me/u/gstraube/log-16...-16&solo=4
Quote:
Originally Posted by Wolfman's Brother View Post
- Timing looks consistent
- Boost reaching target
- Don't see any HPFP data or much else. Data is limited.

I've never scanned for any codes with BimmerLink but now I want to.
I'll echo the comments above - The load control looks good, boost is fine, throttle is dropping out though, did you have the traction control on? - nothing stands out.

And Fuel pump pressure is on there, and it's fine. I wouldn't expect to see any issues on a stock tune.
Yeah it was in sport+ so I guess some traction on. Car continues to ride fine. I'm prob just paranoid. Appreciate all the help
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