2009 BMW 335xi loud ticking

randythedrummer · 09-05-2021, 09:35 PM

Developed a loud ticking recently. Thought it was a vacuum leak but not convinced. Could this be a bad injector? I replaced all the injectors in 2018 with index 12. The car is not throwing any codes at all and has 60k miles (100k kms).
Idle has become a bit rough as well at start up with the odd "shudder" at idle when warmed up.

Any thoughts/insight would be appreciated.

tomasp001 · 09-06-2021, 06:46 AM

Any logs?

randythedrummer · 09-06-2021, 11:17 AM

No logs. I am not running any tune and im not sure if INPA does logging? I may purchase the MHD monitoring app though.

I did unplug injector #1 (which I've always thought didn't install as smooth as the others when I did the injector swap in 2018), and the sound was pretty much gone. Just the standard tick that all N54's seem to produce via direct injection.

I do not think it is rod knock at all since it dense increase with any revs.

Here is the updated vid with injector #1 unplugged, I realize that I am in limp mode and the car runs like garbage, but the sound is now gone.

https://www.youtube.com/watch?v=9S8gZZfvgCw

tomasp001 · 09-06-2021, 02:37 PM

Thats good that you found the culprit!

09-05-2021, 09:35 PM	#1
randythedrummer New Member 9 Rep 25 Posts Drives: 2009 BMW 335xi Join Date: Aug 2018 Location: Victoria, BC iTrader: (0) Garage List 2009 BMW 335xi [0.00]	2009 BMW 335xi loud ticking Developed a loud ticking recently. Thought it was a vacuum leak but not convinced. Could this be a bad injector? I replaced all the injectors in 2018 with index 12. The car is not throwing any codes at all and has 60k miles (100k kms). Idle has become a bit rough as well at start up with the odd "shudder" at idle when warmed up. Any thoughts/insight would be appreciated. Last edited by randythedrummer; 09-05-2021 at 09:41 PM..
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09-06-2021, 06:46 AM	#2
tomasp001 Private First Class 11 Rep 106 Posts Drives: 2008 BMW 335i Join Date: Nov 2019 Location: Scarborough, ON, Canada iTrader: (0) Garage List 2008 BMW 335i [0.00]	Any logs? __________________ __________________ '08 335i AT Titanium Silver \| MHD Stage 2+ (91 oct) \| xHP Stage 3 \| VRSF FMIC [7.5"] \| BMS CP + Tial BOV \| VRSF Catless DP \| VRSF Exhaust [Street] \| BMS Dual Cone CAI \| BMS Cowl Filters \| Bilstein B8 Struts+Eibach Lowering Springs \|
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09-06-2021, 11:17 AM	#3
randythedrummer New Member 9 Rep 25 Posts Drives: 2009 BMW 335xi Join Date: Aug 2018 Location: Victoria, BC iTrader: (0) Garage List 2009 BMW 335xi [0.00]	No logs. I am not running any tune and im not sure if INPA does logging? I may purchase the MHD monitoring app though. I did unplug injector #1 (which I've always thought didn't install as smooth as the others when I did the injector swap in 2018), and the sound was pretty much gone. Just the standard tick that all N54's seem to produce via direct injection. I do not think it is rod knock at all since it dense increase with any revs. Here is the updated vid with injector #1 unplugged, I realize that I am in limp mode and the car runs like garbage, but the sound is now gone. https://www.youtube.com/watch?v=9S8gZZfvgCw
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09-06-2021, 02:37 PM	#4
tomasp001 Private First Class 11 Rep 106 Posts Drives: 2008 BMW 335i Join Date: Nov 2019 Location: Scarborough, ON, Canada iTrader: (0) Garage List 2008 BMW 335i [0.00]	Thats good that you found the culprit! __________________ __________________ '08 335i AT Titanium Silver \| MHD Stage 2+ (91 oct) \| xHP Stage 3 \| VRSF FMIC [7.5"] \| BMS CP + Tial BOV \| VRSF Catless DP \| VRSF Exhaust [Street] \| BMS Dual Cone CAI \| BMS Cowl Filters \| Bilstein B8 Struts+Eibach Lowering Springs \|
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