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      05-23-2013, 10:45 AM   #23
Jay-K
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Quote:
Originally Posted by Pig Farmer View Post
90% sure you either cracked your charge pipe or the charge pipe popped off the throttle body. After the car was restarted, did the throttle sound deeper, and did it feel like you had zero boost? If so, that's likely the issue. If you find the charge pipe is okay, check the FMIC connections and make sure the diverter valves are still plugged in. I've had all three connections come loose under full boost on different occasions. If you can check your codes, you will likely see the code 30FF.
+1, get ER charge pipe.
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      05-23-2013, 12:20 PM   #24
ayao
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Is this symptomatology typical for HPFP failure?
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      05-24-2013, 03:14 PM   #25
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I had the engine fault code come on several weeks ago. took the car to the dealer and picked it up yesterday and was told it was a knock sensor issue. They replaced the part and it appears to be driving OK. Will try and drive some over the next few days and will report back.
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      05-28-2013, 06:14 AM   #26
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Had same issue with knock sensor, haven't had an issue since. it's becoming a common issue on all N54T motors.
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      06-07-2013, 04:51 PM   #27
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Had same thing happen to me yesterday and today.

I started the car yesterday evening and it took a split second longer to turn over. It then generated an "engine malfunction" alert.

I killed the engine and restarted and it was fine. Then I drove home on the highway at 70mph with no issues.

Today the car had another rough startup. It idled very low (sub 1000 rpm) and burned very rich. "Engine malfunction" came up again. I killed the engine and restarted. No problems.

Then I was accelarating from 35-45 and the alert came on again. The screen says the engine is running at reduced power and the cooling fan runs continuously.

Charge pipe looks ok.

Last edited by Dee Pee; 06-07-2013 at 05:07 PM..
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      06-07-2013, 07:42 PM   #28
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For those whose car's knock sensor has been changed by the dealer: do you happen to know if they put a different/new sensor or just replaced it with the same one that comes from factory? If there is a different sensor, do you guys have a part number to share?
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      06-07-2013, 07:53 PM   #29
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mine not changed as yet , but will be getting done when a return home.. I will ask if it is a different part... but they were on back order when i took mine in....
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      06-07-2013, 08:03 PM   #30
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Quote:
Originally Posted by Axelf View Post
mine not changed as yet , but will be getting done when a return home.. I will ask if it is a different part... but they were on back order when i took mine in....
Thanks, this should help everyone who may eventually have this issue. Especially, for people like me who has a single and essentially useless official service around.
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      06-07-2013, 08:16 PM   #31
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Soon as I get a report and solution on what's causing my CEL alert, I will post along with any relevant info that may be helpful.
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      06-07-2013, 09:34 PM   #32
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Quote:
Originally Posted by Dee Pee View Post
Soon as I get a report and solution on what's causing my CEL alert, I will post along with any relevant info that may be helpful.
Thanks!
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      06-10-2013, 05:30 PM   #33
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Aaaaaand the diagnosis is the HPFP.

Of course it's not in stock and has to be express mailed which means I won't have my car back until Wednesday.

Really BMW? REALLY?

You have a known problem and don't advise your dealers to stock the friggin HPFP's? I mean the N54 engine ain't exactly rare.
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