Rough Idle at Cold Start

Cuxhaven · 09-29-2024, 12:01 AM

Rough Idle at cold startup. 2017 F48 xdrive 28i. This has been random for about a year does it about once a month. I ended up last week doing a tuneup. New spark plugs ditched those Champion plugs with NGK and replaced new coils. All ordered from FCP Euro Thinking this would fix the issue. 4 days later did it again. Did not fix the issue. No codes being thrown. Been reading forums this is a common issue and could be in need of a software upgrade. What’s everyone thoughts on this?

E39M5Dan · 09-29-2024, 05:39 PM

How's your motor mount? My wife's was clunky on start up... the motor mount on the passenger side was shot, letting the engine bounce around.

Cuxhaven · 10-07-2024, 10:23 PM

Found the issue!! Was the PVC Purge Valve. Replaced it and no issues then yesterday I received a letter from BMW for the exact part I just fixed. Ordered it through FCP Euro. Motor mounts are good.

stefdeath · 10-08-2024, 04:54 AM

Great !
Could you give us the part number ?
Just to know - in case of similar problems

Cuxhaven · 10-08-2024, 05:33 PM

Here is the part #13907614013 Fuel Tank Breather Valve - Bosch

Here is the location where it’s located. Very easy fix. Right on top of engine front mounted.

It’s the same part listed in the BMW letter.

TS263G · 10-09-2024, 12:22 PM

Quote:

Originally Posted by Cuxhaven

Found the issue!! Was the PVC Purge Valve. Replaced it and no issues then yesterday I received a letter from BMW for the exact part I just fixed. Ordered it through FCP Euro. Motor mounts are good.

Good you found a solution to your problem! all's well now i hope.

Just for clarity, with the initial issue you had with the rough idle, is it only during after a cold startup?

Let us know pls. thanks.

TS263G · 10-09-2024, 12:24 PM

sorry, to be more precise, only during a cold startup, and not any other time?

Cuxhaven · 10-09-2024, 01:30 PM

Quote:

Originally Posted by TS263G

sorry, to be more precise, only during a cold startup, and not any other time?

Correct only was at cold starts was random. Has not done it since replacing the part.

E39M5Dan · 10-13-2024, 08:52 PM

Yup... that's the same one I replaced a few years ago... glad you solved it easily.

f48aficionado · 10-15-2024, 10:57 PM

Would love to know if the EVAP valve is the actual solution to this. I've read that some people replaced the EVAP valve, and the rough start returned after a few days. Other people say the rough start is a software problem. Dealership staff is useless - they won't talk to me until I agree to a $340 charge for diagnostics-only.

09-29-2024, 12:01 AM	#1
Cuxhaven New Member 2 Rep 15 Posts Drives: BMW X1, X3 F25, F48 Join Date: Sep 2024 Location: Florida iTrader: (0)	Rough Idle at Cold Start Rough Idle at cold startup. 2017 F48 xdrive 28i. This has been random for about a year does it about once a month. I ended up last week doing a tuneup. New spark plugs ditched those Champion plugs with NGK and replaced new coils. All ordered from FCP Euro Thinking this would fix the issue. 4 days later did it again. Did not fix the issue. No codes being thrown. Been reading forums this is a common issue and could be in need of a software upgrade. What’s everyone thoughts on this?
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09-29-2024, 05:39 PM	#2
E39M5Dan Enlisted Member 11 Rep 40 Posts Drives: 2017 BMW X1 28SDrive Join Date: Mar 2020 Location: Woodlands, TX iTrader: (0) Garage List 1996 BMW 328is [0.00] 2017 BMW X1 [0.00] 2000 BMW M5 [0.00]	How's your motor mount? My wife's was clunky on start up... the motor mount on the passenger side was shot, letting the engine bounce around.
	Appreciate 1 Cuxhaven1.50 Quote

10-07-2024, 10:23 PM	#3
Cuxhaven New Member 2 Rep 15 Posts Drives: BMW X1, X3 F25, F48 Join Date: Sep 2024 Location: Florida iTrader: (0)	Found the issue!! Was the PVC Purge Valve. Replaced it and no issues then yesterday I received a letter from BMW for the exact part I just fixed. Ordered it through FCP Euro. Motor mounts are good.
	Appreciate 0 Quote

10-08-2024, 04:54 AM	#4
stefdeath New Member 2 Rep 5 Posts Drives: F48 Join Date: Nov 2023 Location: Warsaw iTrader: (0)	Great ! Could you give us the part number ? Just to know - in case of similar problems
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10-08-2024, 05:33 PM	#5
Cuxhaven New Member 2 Rep 15 Posts Drives: BMW X1, X3 F25, F48 Join Date: Sep 2024 Location: Florida iTrader: (0)	Here is the part #13907614013 Fuel Tank Breather Valve - Bosch Here is the location where it’s located. Very easy fix. Right on top of engine front mounted. It’s the same part listed in the BMW letter. Attached Images Last edited by Cuxhaven; 10-08-2024 at 05:34 PM..
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10-09-2024, 12:24 PM	#7
TS263G New Member 0 Rep 12 Posts Drives: 2017 BMW X1 Join Date: Aug 2023 Location: Vancouver, Canada iTrader: (0)	sorry, to be more precise, only during a cold startup, and not any other time?
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10-13-2024, 08:52 PM	#9
E39M5Dan Enlisted Member 11 Rep 40 Posts Drives: 2017 BMW X1 28SDrive Join Date: Mar 2020 Location: Woodlands, TX iTrader: (0) Garage List 1996 BMW 328is [0.00] 2017 BMW X1 [0.00] 2000 BMW M5 [0.00]	Yup... that's the same one I replaced a few years ago... glad you solved it easily.
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10-15-2024, 10:57 PM	#10
f48aficionado New Member 2 Rep 6 Posts Drives: F48 Join Date: Sep 2024 Location: California iTrader: (0)	Would love to know if the EVAP valve is the actual solution to this. I've read that some people replaced the EVAP valve, and the rough start returned after a few days. Other people say the rough start is a software problem. Dealership staff is useless - they won't talk to me until I agree to a $340 charge for diagnostics-only.
	Appreciate 0 Quote