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      06-06-2014, 09:12 AM   #1
DEA333
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Loss of power, shudder, and hesitation

Anyone else have problems with the car shuddering from a stop or the car losing power while accelerating or hesitating? The DSC sensor and HPFP has already been replaced and the clutch adaptation has been reset yet the problems persist.

I also have been having various electric issue with the AC not working, windows that will not stay up, and various iDrive problems.
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      06-06-2014, 12:30 PM   #2
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check out in the injectors ?
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      06-06-2014, 01:03 PM   #3
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Most likely injectors, had similar issues with worn out injectors.
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      06-06-2014, 01:51 PM   #4
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Exact same problem turned out to be injectors on my N54 135i. There was a SB on that issue from several years ago
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      06-06-2014, 02:55 PM   #5
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I keep hearing about problems with the injectors. I only use premium unleaded in my car which is what's recommended by the manufacturer. So far I have had no issues.

There is also up to 15% ethanol added to our fuels here in the USA which can't be good on the injectors.

Is there any particular fuel treatment recommended for use in our cars to help prevent this problem?
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      06-06-2014, 03:47 PM   #6
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Quote:
Originally Posted by COOLZ4 View Post
I keep hearing about problems with the injectors. I only use premium unleaded in my car which is what's recommended by the manufacturer. So far I have had no issues.

There is also up to 15% ethanol added to our fuels here in the USA which can't be good on the injectors.

Is there any particular fuel treatment recommended for use in our cars to help prevent this problem?
I have only ever had "top tier" 91 and 100 octane fuel in my car, and make sure the oil is up to operating temperature (and then some) to minimize carbon deposits and still had injector failure. Not sure there is anything we can do short of replacing them when they fail.
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      06-06-2014, 05:15 PM   #7
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There's someone servicing injectors on e90post... Much rather just get a brand new set for piece of mind. Not sure what model injectors you have but get the updated ones if you end up getting new ones.
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      06-06-2014, 06:27 PM   #8
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FWIW I throw in some fuel treatment every 5000 miles for good measure.
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      06-09-2014, 10:58 AM   #9
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The injectors have pretty much been ruled out. The problems started shortly after delivery has been serviced 8 or 9 times already and I don't even have 10k miles on her. The service department seems to agree that it's an electronics issue but since it's intermittent and hasn't been throwing any codes lately there is not they can do.

Just an update, after I submitted my original post all four windows kept opening and wouldn't stay closed (and yes it was raining). It took a restart to get this issue solved for now.
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      06-09-2014, 12:43 PM   #10
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Mine feels like it's going to stall right before coming to a complete stop. Only when the A/C is on. The entire car shakes when coming up to stop signs and red lights. As soon as I take my foot off the brake it's fine. Dealership cannot duplicate the issue??
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      07-02-2014, 08:09 PM   #11
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I have experienced a few stall within 2 months. 3 times whe I backed into parking and 1 time after going over a speed bump at parking lot gates ~ all at nearly normal idle RPM. All had no error code after checking with bluebooth ; in fact, no even audible warning or warning sign on the dashboard

Last edited by shlai; 07-04-2014 at 10:51 AM..
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      07-02-2014, 11:24 PM   #12
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Quote:
Originally Posted by DEA333 View Post
The injectors have pretty much been ruled out. The problems started shortly after delivery has been serviced 8 or 9 times already and I don't even have 10k miles on her. The service department seems to agree that it's an electronics issue but since it's intermittent and hasn't been throwing any codes lately there is not they can do.

Just an update, after I submitted my original post all four windows kept opening and wouldn't stay closed (and yes it was raining). It took a restart to get this issue solved for now.
There's something YOU can do, and that is lawyer up and check on your state's lemon laws. (or at least contact BMWNA and politely mention your intent to lawyer up as well as the issues you have been facing with your 1 year old car)
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      07-03-2014, 05:51 AM   #13
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Quote:
Originally Posted by jparnes1 View Post
FWIW I throw in some fuel treatment every 5000 miles for good measure.
Can you please give more details on fuel treatment.
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      07-03-2014, 07:37 AM   #14
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Quote:
Originally Posted by cuddapah
Quote:
Originally Posted by jparnes1 View Post
FWIW I throw in some fuel treatment every 5000 miles for good measure.
Can you please give more details on fuel treatment.
Buy some Techron (20 oz size) and pour it in the tank every 5k. It helps to clean the injectors and minimize carbon buildup.
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      07-03-2014, 07:48 AM   #15
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Quote:
Originally Posted by nicknaz
Quote:
Originally Posted by DEA333 View Post
The injectors have pretty much been ruled out. The problems started shortly after delivery has been serviced 8 or 9 times already and I don't even have 10k miles on her. The service department seems to agree that it's an electronics issue but since it's intermittent and hasn't been throwing any codes lately there is not they can do.

Just an update, after I submitted my original post all four windows kept opening and wouldn't stay closed (and yes it was raining). It took a restart to get this issue solved for now.
There's something YOU can do, and that is lawyer up and check on your state's lemon laws. (or at least contact BMWNA and politely mention your intent to lawyer up as well as the issues you have been facing with your 1 year old car)
Nick is right. So much trouble right out of the box smells like a lemon. Check out what the FLA lemon laws says. NY lemon law says if your car is less than 18 months old and has been serviced 4 times or 30 days in the shop for the same problem, you qualify under the law.
However BMW will not let you lemon the car. They will offer a buy back and put you in a new car. Talk to your sales manager or if he's not receptive call BMWNA.
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Last edited by jparnes1; 07-03-2014 at 09:13 AM..
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      07-03-2014, 10:21 AM   #16
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Quote:
Originally Posted by 2011CrazE89 View Post
Mine feels like it's going to stall right before coming to a complete stop. Only when the A/C is on. The entire car shakes when coming up to stop signs and red lights. As soon as I take my foot off the brake it's fine. Dealership cannot duplicate the issue??
Exact same here. Doesnt happen often though. And only when AC is on
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      07-03-2014, 12:49 PM   #17
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Quote:
Originally Posted by airmarc View Post
Exact same here. Doesnt happen often though. And only when AC is on
Guys, at the risk of stating the obvious, it is NOT normal that your car feels like it is going to stall with the AC on. Even if the ambient temps are 100F and the AC is working at full capacity that shouldn't happen.

If possible, take a vid, take the techs for a test drive, etc
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      07-03-2014, 02:10 PM   #18
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Quote:
Originally Posted by airmarc View Post
Exact same here. Doesnt happen often though. And only when AC is on
Quote:
Originally Posted by nicknaz View Post
Guys, at the risk of stating the obvious, it is NOT normal that your car feels like it is going to stall with the AC on. Even if the ambient temps are 100F and the AC is working at full capacity that shouldn't happen.

If possible, take a vid, take the techs for a test drive, etc
It does it at least twice a week. I did notice that the RPM's drop to 0 and then immediately jump back up as soon as I release the brake. I've been to the dealer three times and they could never duplicate it. Very Frustrating.
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      07-03-2014, 02:41 PM   #19
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Could it possibly be battery or cable issue? Might be worthwhile to monitor voltage from aux power point and see if any correlation. low rpm + load (ac / brakes). Voltage drop?
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      07-03-2014, 02:55 PM   #20
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Quote:
Originally Posted by 2011CrazE89 View Post
It does it at least twice a week. I did notice that the RPM's drop to 0 and then immediately jump back up as soon as I release the brake. I've been to the dealer three times and they could never duplicate it. Very Frustrating.
Keep at it, and make sure it is documented they tried to find but couldn't so that when they do find it, you have a paper trail of the first time you reported the problem and an estimate of the time you have used up in the shop.

Also take a vid and document all the things you can when it happens (i.e. how long you've been driving, ambient temp, status of the AC, etc etc)

I know the feeling well since I am working through my own intermittent problem with the headlight aiming at the ground from time to time
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      07-04-2014, 10:46 AM   #21
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Other than engine stalling at low RPM, I also notice my car burn more gas and feels less powerful. I open the air filter to see if any air duct cracks as this was my problem in my old E85. I took a photo of the air duct after removing the air filter and I found this:
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      07-04-2014, 02:25 PM   #22
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Quote:
Originally Posted by shlai View Post
I have experienced a few stall within 2 months. 3 times whe I backed into parking and 1 time after going over a speed bump at parking lot gates ~ all at nearly normal idle RPM. All had no error code after checking with bluebooth ; in fact, no even audible warning or warning sign on the dashboard
Whoa....How can I check for error codes via BT?
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