Clunk and loss of power when accelerating at high RPM's

Colby Jack · 11-17-2014, 05:38 PM

Hi all, this is my first post. I bought a 2006 330xi about a month ago with about 100k on it. I've noticed when I accelerate hard going fast (>75mph) the car clunks and I lose power until I let off the gas again and then it seems to be fine. It is an automatic transmission and has done this in D and DS mode, haven't tried it in manual. Anything helps!

David0ff · 11-17-2014, 07:23 PM

post a vid it may help

mrtt · 11-18-2014, 09:10 PM

can you check if you have any codes? do you have a OBD scanner?

Colby Jack · 11-19-2014, 09:30 AM

I don't have a scanner but nothing is showing up on the dashboard. I will try to take a video today. Basically when I floor it, it speeds up for a while then clunks and cuts out, then I let off the gas and it seems to be normal again.

David0ff · 11-19-2014, 11:49 AM

what happense if you try this:
car standing still
in neutral sweep the rpm all the way up slowly back and forth, don't smack the red line .
do this with different throttle levels.

Colby Jack · 11-19-2014, 12:49 PM

I'm at work for another four hours but I can try that later and post an update.

Colby Jack · 11-20-2014, 09:39 AM

I made a video and put it on youtube. This is normally what would happen. This was also in DS mode. I tried it again in D mode and the same thing happened at a certain RPM and then a big red exclamation point appeared on the dash and I could not shift up or down or switch to DS or manual mode. It was stuck in that gear until I exited the hwy and turned the car on and off. Is this normal?

thomas88162 · 11-20-2014, 10:44 AM

Sounds like a transmission issue...

smellthebeans · 11-20-2014, 11:22 AM

Sounds and looks like a flare shift. Could be a logic controller (mechatronic sleeve) or a physical issue with the internal workings of the valve body. Possibly one of the solenoids are sticking then bursting open causing the rough shifting and fault. This physical problem may not leave a fault code stored in the DME (which makes trouble shooting tricky).

David0ff · 11-22-2014, 10:29 AM

Quote:

Originally Posted by Colby Jack

I made a video and put it on youtube. This is normally what would happen. This was also in DS mode. I tried it again in D mode and the same thing happened at a certain RPM and then a big red exclamation point appeared on the dash and I could not shift up or down or switch to DS or manual mode. It was stuck in that gear until I exited the hwy and turned the car on and off. Is this normal?

yeah most def a tranny issue, hard to tell if mechanical or sensor related but i am leaning more towards mechanical at this point.

have to open her up

Colby Jack · 11-25-2014, 09:37 AM

I know the transmission fluid should be changed soon and I'm getting it done in about a week. Think that'll help if its a shift flare?

11-17-2014, 05:38 PM	#1
Colby Jack New Member 1 Rep 26 Posts Drives: 2014 335i X-drive Join Date: Oct 2014 Location: United States iTrader: (0)	Clunk and loss of power when accelerating at high RPM's Hi all, this is my first post. I bought a 2006 330xi about a month ago with about 100k on it. I've noticed when I accelerate hard going fast (>75mph) the car clunks and I lose power until I let off the gas again and then it seems to be fine. It is an automatic transmission and has done this in D and DS mode, haven't tried it in manual. Anything helps!
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11-17-2014, 07:23 PM	#2
David0ff Combined Applications Group 1059 Rep 680 Posts Drives: Lada Scrapus Trofeo R Join Date: Jan 2014 Location: Classified iTrader: (1)	post a vid it may help
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11-18-2014, 09:10 PM	#3
mrtt Private First Class 38 Rep 179 Posts Drives: E46/E60/E92/F10/E55 Join Date: Jan 2013 Location: Jersey iTrader: (1)	can you check if you have any codes? do you have a OBD scanner?
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11-19-2014, 09:30 AM	#4
Colby Jack New Member 1 Rep 26 Posts Drives: 2014 335i X-drive Join Date: Oct 2014 Location: United States iTrader: (0)	I don't have a scanner but nothing is showing up on the dashboard. I will try to take a video today. Basically when I floor it, it speeds up for a while then clunks and cuts out, then I let off the gas and it seems to be normal again.
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11-19-2014, 11:49 AM	#5
David0ff Combined Applications Group 1059 Rep 680 Posts Drives: Lada Scrapus Trofeo R Join Date: Jan 2014 Location: Classified iTrader: (1)	what happense if you try this: car standing still in neutral sweep the rpm all the way up slowly back and forth, don't smack the red line . do this with different throttle levels.
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11-19-2014, 12:49 PM	#6
Colby Jack New Member 1 Rep 26 Posts Drives: 2014 335i X-drive Join Date: Oct 2014 Location: United States iTrader: (0)	I'm at work for another four hours but I can try that later and post an update.
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11-20-2014, 09:39 AM	#7
Colby Jack New Member 1 Rep 26 Posts Drives: 2014 335i X-drive Join Date: Oct 2014 Location: United States iTrader: (0)	I made a video and put it on youtube. This is normally what would happen. This was also in DS mode. I tried it again in D mode and the same thing happened at a certain RPM and then a big red exclamation point appeared on the dash and I could not shift up or down or switch to DS or manual mode. It was stuck in that gear until I exited the hwy and turned the car on and off. Is this normal?
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11-20-2014, 10:44 AM	#8
thomas88162 Lieutenant 19 Rep 595 Posts Drives: E92 328i Join Date: Jun 2013 Location: Clinton, IN iTrader: (0)	Sounds like a transmission issue...
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11-20-2014, 11:22 AM	#9
smellthebeans Lieutenant Colonel 87 Rep 1,555 Posts Drives: LPCs Join Date: Dec 2006 Location: San Antonio iTrader: (2) Garage List 1990 325i [0.00]	Sounds and looks like a flare shift. Could be a logic controller (mechatronic sleeve) or a physical issue with the internal workings of the valve body. Possibly one of the solenoids are sticking then bursting open causing the rough shifting and fault. This physical problem may not leave a fault code stored in the DME (which makes trouble shooting tricky). __________________ Last edited by smellthebeans; 11-20-2014 at 11:28 AM..
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11-25-2014, 09:37 AM	#11
Colby Jack New Member 1 Rep 26 Posts Drives: 2014 335i X-drive Join Date: Oct 2014 Location: United States iTrader: (0)	I know the transmission fluid should be changed soon and I'm getting it done in about a week. Think that'll help if its a shift flare?
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