[BoyOhBoyyy]

Want to make sure I'm not the only one who notices a vibration in the acceleration pedal and overall car within the 1-2k rpm range and only at low speeds. I've read that this is common with extra boost? I'm currently on BM3 Stage 2

[thejeremyman9]

Never heard of it, and you are probably not building any boost at 1-2k rpm unless you literally floor it from idle in 1st gear, or lock it in a higher gear and floor it from 1k rpm. You can check a datalog to confirm.

[harkes]

Logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs

[thejeremyman9]

Originally Posted by harkes

Logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs logs

I know right? There should be a popup notification whenever asking a question that prompts you to upload/link a log, lol.

[BOOSTEDMIKE]

I had this problem FBO Stage 2 BM3. Stuttering and vibration 1-3k rpm. Turned out to be bad plugs and coils. Also a broken turbo inlet pipe.

[BoyOhBoyyy]

Originally Posted by thejeremyman9

I know right? There should be a popup notification whenever asking a question that prompts you to upload/link a log, lol.

Oops, let me learn how to log correctly and I will get one uploaded sometime!

[BoyOhBoyyy]

Originally Posted by FAUXSHO

I had this problem FBO Stage 2 BM3. Stuttering and vibration 1-3k rpm. Turned out to be bad plugs and coils. Also a broken turbo inlet pipe.

Appreciate the response! I do notice shaking during cold start but very subtly and only for first 4-5 seconds. No codes or anything. I'm at 42k on OEM plugs never changed so maybe that's why and OEM coils. Any way I can visually check the inlet from opening the hood and without having to remove the turbo inlet?

[DreamerJoe]

Originally Posted by BoyOhBoyyy

Oops, let me learn how to log correctly and I will get one uploaded sometime!

I'm not exactly sure how you start/stop in BM3, but they recently added an auto logging feature which is handy. if you're an auto transmission log in 4th gear, manual in 3rd. put car in sport+ and then hold your DSC button down for 5 seconds until you get the message on your iDrive. hold car at 2,500 for a couple seconds then throttle to 100% and hold until 6,500rpm or as close as you can get safely. also, maybe check your oil level too? I try to check mine before I plan on redlining the car a few times.

[thejeremyman9]

Originally Posted by BoyOhBoyyy

Appreciate the response! I do notice shaking during cold start but very subtly and only for first 4-5 seconds. No codes or anything. I'm at 42k on OEM plugs never changed so maybe that's why and OEM coils. Any way I can visually check the inlet from opening the hood and without having to remove the turbo inlet?

Grab a set of new OEM plugs and put them it. I just did mine last weekend at 45k miles (which were the original, unchanged set). Everything is documented in this thread if you need more info.

https://f30.bimmerpost.com/forums/sh....php?t=1709198

I would not put new coils on unless it turns out you have a specific problem with one.

There is not really an easy way to check the inlet unfortunately. Maybe if you pull the belly pan off and use your camera to try and take pictures. Maybe a reason to get an upgraded one

[BoyOhBoyyy]

Originally Posted by DreamerJoe

I'm not exactly sure how you start/stop in BM3, but they recently added an auto logging feature which is handy. if you're an auto transmission log in 4th gear, manual in 3rd. put car in sport+ and then hold your DSC button down for 5 seconds until you get the message on your iDrive. hold car at 2,500 for a couple seconds then throttle to 100% and hold until 6,500rpm or as close as you can get safely. also, maybe check your oil level too? I try to check mine before I plan on redlining the car a few times.

Thanks Joe! Let me give this a shot tomorrow or Friday. Always saw YouTube vids of people literally clicking log and then trying to stop the log in the middle of driving so definitely going to look into auto logging. Never had this problem with MHD so I have a feeling it has to do with the plugs since the first sign is the slight shaking at idle

[BoyOhBoyyy]

Originally Posted by thejeremyman9

Grab a set of new OEM plugs and put them it. I just did mine last weekend at 45k miles (which were the original, unchanged set). Everything is documented in this thread if you need more info.

https://f30.bimmerpost.com/forums/sh....php?t=1709198

I would not put new coils on unless it turns out you have a specific problem with one.

There is not really an easy way to check the inlet unfortunately. Maybe if you pull the belly pan off and use your camera to try and take pictures. Maybe a reason to get an upgraded one

Hahah really doubt it would be the turbo inlet but I could be wrong! Let me start first with the plugs and I'll report back when I do get a chance. Next step after would be putting the car on a lift and checking the inlet!

[DreamerJoe]

Originally Posted by BoyOhBoyyy

Thanks Joe! Let me give this a shot tomorrow or Friday. Always saw YouTube vids of people literally clicking log and then trying to stop the log in the middle of driving so definitely going to look into auto logging. Never had this problem with MHD so I have a feeling it has to do with the plugs since the first sign is the slight shaking at idle

just to clarify, you have bm3 or mhd? you original post said bm3 stage 2. if you have MHD, just click "MON." on the bottom of screen, check the box to enable auto logging and the top box, forget exactly what it says rn..