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06-06-2014, 09:12 AM | #1 |
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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. |
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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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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07-03-2014, 05:51 AM | #13 |
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07-03-2014, 07:37 AM | #14 |
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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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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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2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA. 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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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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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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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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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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