11-29-2017, 06:26 PM | #1 |
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Car Stutters when driving off from stop
Fellow members,
New issue to me, I have tried the search function but no luck on the 1m forum, there are many topics about BMW acceleration stutter but non that address what I am experiencing. When the car is cold, it starts normally, drives normally, accelerates normally. During warm up (to final operating temp.) car is fine Once the car is at its' maximum or normal operating temperature when accelerating normally from a standstill the car shudders, stutters and there is rumblings from the rear diff. When the car is warmed up... it feels like there is an additional load on the car preventing it from accelerating (like someone attached a piano to the car). At times there are some noticeable "slow" transmission shifts but I am not sure if this is related or not. Once rolling, there is no performance issue at all. ... Just a stutter and what sounds to me like diff rumblings from a take off. Update: January 13th 2018: Hello all, To Update this thread, the issue with the car is the dual-mass flywheel assembly (self diagnosed). When the car is running and in neutral there is a distinct flywheel chatter when you release the clutch pedal. I invision that the stutter and vibrations through the chassis that I am feeling is the flywheel's inability to smooth out the power delivery of the straight 6. I heard the flywheel chatter earlier in the car's life and dismissed it as normal M car idle noises, however the chatter is slightly worse now and I have the new symptom of the aforementioned stutter. Is it safe to drive the car with the early signs and symptoms? What are the ill effects of driving the car over a prolonged time with the dual mass flywheel damage? Last edited by rapter; 01-13-2018 at 02:37 PM.. |
11-30-2017, 11:49 AM | #4 |
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55,000 km on the car. Walnut blasting is a maybe.
I have the driveshaft recall notification but have not performed it yet. Maybe this is the issue. I suspected the transmission fluid may need a flush. I am hesitant to touch the rear diff fluid because a flush could cause more issues. Taking it into the dealer Tuesday. It is interesting that the sensation is only when the car is fully warmed up |
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12-01-2017, 09:55 AM | #6 |
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Any update from your side? I've been following this waiting to see what the resolution is. I thankfully do not have this issue. Granted, I haven't driven my car in about 7 months....
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12-01-2017, 10:01 AM | #7 |
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Have you checked for any error codes with a code reader? I would start there. It could be spark plugs, coils, high pressure fuel pump, walnut blast, boost leak, o2 sensors.
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12-01-2017, 10:52 AM | #8 | |
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I find this incredible hard to believe given the amount of clutch travel I have +60% ... and I am an extremely excellent manual driver (no abuse or clutch slipping). Could someone illuminate how a cold clutch operates fine and a hot clutch does not ? |
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12-01-2017, 12:33 PM | #9 | ||
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12-01-2017, 02:17 PM | #10 | |||
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I have never heard of a clutch glazing over due to normal use. I totally understand if the clutch was glazed due to slipping or high rpm damage. Is it possible that the portion of "glazed" clutch material will wear away with time and the. The remainder of the clutch will operate normally ? Similar to burning off glazing on break pads |
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12-01-2017, 03:56 PM | #11 | |
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Just curious, do you ever hold the car in place with the clutch? |
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12-01-2017, 06:25 PM | #12 | ||
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There is no residues or fluids on my garage floor. Further information that during the shudder occurrence there is no change in engine rpm, rpm remains steady, transmission stick shakes violently and diff makes noise... No, I never hold the car on a hill with the clutch that is a Job for the handbrake or the main breaks.... good question though. For the record I have only once successfully been able to machine glazed pads back to life. |
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12-01-2017, 09:00 PM | #13 | |
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Make sure if you get a clutch to address the main seal just in case. |
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01-13-2018, 02:37 PM | #14 |
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Hello all,
To Update this thread, the issue with the car is the dual-mass flywheel assembly (self diagnosed). When the car is running and in neutral there is a distinct flywheel chatter when you release the clutch pedal. I invision that the stutter and vibrations through the chassis that I am feeling is the flywheel's inability to smooth out the power delivery of the straight 6. I heard the flywheel chatter earlier in the car's life and dismissed it as normal M car idle noises, however the chatter is slightly worse now and I have the new symptom of the aforementioned stutter. Is it safe to drive the car with the early signs and symptoms? What are the ill effects of driving the car over a prolonged time with the dual mass flywheel damage? |
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02-14-2018, 09:43 PM | #15 |
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Mind does something similar.
Did tons and tons of research after I bought the car (2014) - Lots of threads/forums reporting a similar issue, with respect to M3s (also with dual mass fly wheels). Example with video: http://www.m3post.com/forums/showthread.php?t=1071286 Been driving the car for 4 years without any related problems.
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