Yet another n54 with injector issue? (with video)

mattsy · 08-12-2014, 12:45 PM

Link to video:

Basically trying to figure this one out. The car has about 96k miles on it. Was coming home after a long trip to notice the tapping (which you hear in the video, i assumed it was hydraulic lifters) started being much more intense and consistent with load (does not tap at idle). I decided to try going wot and the car misfired, threw a CEL, and I assumed deactived a cylinder (sounded terrible).

Limped the car home and got a code for misfire on cyl 6.

The car had a walnut blast done and new plugs dont about 1000 miles ago. The car is tuned (Cobb pro tune). Any thoughts or ideas? I am thinking a failing injector (cylinder 6 plug has always come out smelling like fuel before) finally just gave up.

e92_enthusiast_1 · 08-12-2014, 12:58 PM

Troubleshoot it. Switch plugs and coils with 2 diff cylinders and see if it follows. I bet it's a coil how old are yours?

nvn · 08-12-2014, 01:02 PM

Someone had a similar problem and same exact noise not too long ago. It was discussed on another forum. (BB) Replacing the injector fixed the issue.

mattsy · 08-12-2014, 01:11 PM

Quote:

Originally Posted by e92_enthusiast_1

Troubleshoot it. Switch plugs and coils with 2 diff cylinders and see if it follows. I bet it's a coil how old are yours?

I would venture to say original, however, I am the 2nd owner. I will swap it to see if the misfire follows.

'___' · 08-12-2014, 02:32 PM

Quote:

Originally Posted by nvn

Someone had a similar problem and same exact noise not too long ago. It was discussed on another forum. (BB) Replacing the injector fixed the issue.

Quote:

Originally Posted by mattsy

I would venture to say original, however, I am the 2nd owner. I will swap it to see if the misfire follows.

Don't waste your time with the coil and plug. The other quote is absolutely right from what other people with the same noise have found.

IT"S AN INJECTOR. Hurry up and replace it too. That can cause serious problems if left unattended according to alexabrhouston, or whatever his name is, on BB.

bigdaddycane · 08-12-2014, 02:37 PM

that sounds like a bad injector....

240Z in front of your car?

e92_enthusiast_1 · 08-12-2014, 02:39 PM

I made that suggestion from my phone app without watching the video. I would probably follow other's advice on this one. Sounds serious. Good thing is that if you have way to code it yourself and injector replace isnt too bad.

Quote:

Originally Posted by mattsy

I would venture to say original, however, I am the 2nd owner. I will swap it to see if the misfire follows.

mattsy · 08-12-2014, 03:10 PM

Quote:

Originally Posted by bigdaddycane

that sounds like a bad injector....

240Z in front of your car?

Good catch. 260z with L28 swap. It's my autocross car (though its up for sale).

Gizm0 · 08-12-2014, 04:17 PM

Sounds like a leaky injector...

bigdaddycane · 08-12-2014, 04:43 PM

Quote:

Originally Posted by mattsy

Good catch. 260z with L28 swap. It's my autocross car (though its up for sale).

something told me 260 but was not sure. I had a 280Z that I completely restored (paint, suspension and motor as well) and later sold. Fun car, tho I would rather have had the lighter 240/260 with carbs but didn't have the money to go all the way as you have.

mattsy · 08-13-2014, 01:35 PM

Just to go full circle with this thread. Got a set of injectors from ECS (12 index) to swap out all of the injectors. The injector on cylinder 6 had no decoupling element! So obviously someone screwed it up before me. Lame.

Anyways, that sound is gone now, car runs better! Will have to get it coded still at some point, but I'm happy.

Gizm0 · 08-13-2014, 01:38 PM

Quote:

Originally Posted by mattsy

Just to go full circle with this thread. Got a set of injectors from ECS (12 index) to swap out all of the injectors. The injector on cylinder 6 had no decoupling element! So obviously someone screwed it up before me. Lame.

Anyways, that sound is gone now, car runs better! Will have to get it coded still at some point, but I'm happy.

You were asking us to help diagnose your problem 24 hours ago, and now you have already ordered, and installed all 6 new injectors? That was quick! Good job mayne! It helps to be only 70 miles away from ECS i guess...

mattsy · 08-13-2014, 02:02 PM

I ordered and took the video slightly before I posted this thread. I was committed to the injectors mainly because I had done almost everything else. I thought I lost my mind!

Anyways yea, they are actually really easy to install. Without the decouple on cyl 6, the injector was practically falling out. No wonder the car ran like garbage.

08-12-2014, 12:45 PM	#1
mattsy Enlisted Member 0 Rep 33 Posts Drives: 07 335i Join Date: Nov 2012 Location: Hudson, MA iTrader: (1)	Yet another n54 with injector issue? (with video) Link to video: Basically trying to figure this one out. The car has about 96k miles on it. Was coming home after a long trip to notice the tapping (which you hear in the video, i assumed it was hydraulic lifters) started being much more intense and consistent with load (does not tap at idle). I decided to try going wot and the car misfired, threw a CEL, and I assumed deactived a cylinder (sounded terrible). Limped the car home and got a code for misfire on cyl 6. The car had a walnut blast done and new plugs dont about 1000 miles ago. The car is tuned (Cobb pro tune). Any thoughts or ideas? I am thinking a failing injector (cylinder 6 plug has always come out smelling like fuel before) finally just gave up.
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08-12-2014, 12:58 PM	#2
e92_enthusiast_1 Lieutenant Colonel 118 Rep 1,709 Posts Drives: '10 AW/CR e92 6mt 335i Join Date: Mar 2012 Location: Tempe, AZ iTrader: (1) Garage List 2010 BMW 335i [10.00]	Troubleshoot it. Switch plugs and coils with 2 diff cylinders and see if it follows. I bet it's a coil how old are yours?
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08-12-2014, 01:02 PM	#3
nvn Second Lieutenant 23 Rep 230 Posts Drives: 2013 335is E93 Join Date: Mar 2013 Location: San Diego, CA iTrader: (3) Garage List 2013 BMW 335is E93 [0.00]	Someone had a similar problem and same exact noise not too long ago. It was discussed on another forum. (BB) Replacing the injector fixed the issue.
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08-12-2014, 02:37 PM	#6
bigdaddycane I even mod my cereal 268 Rep 3,481 Posts Drives: 11 ZCP DCT M3 14 328d 21 GT4 Join Date: Aug 2009 Location: Northern Va iTrader: (53) Garage List 2021 Porsche GT4 [0.00] 2014 BMW 328d Xdriv ... [0.00] 2011 BMW M3 [0.00]	that sounds like a bad injector.... 240Z in front of your car? __________________ 2011 Mineral White M3 ZCP - Opticoat, Ventureshield, some CF, B&B exhaust, AFE Intake Vorsteiner VFF 101s Ohlins 2014 Mineral White 328d Xdrive Wagon - Opticoat, Ventureshield, B8s, H&R, Apex SM-10s Hawk Pads 2021 718 Cayman GT4 - Fire extinguiser, Neodyme GT3 Wheel Color
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08-12-2014, 04:17 PM	#9
Gizm0 Colonel 439 Rep 2,136 Posts Drives: 08 e92 335i 6mt Join Date: Jan 2013 Location: Virginia iTrader: (1)	Sounds like a leaky injector... __________________ JB4 G5 w/ Backend flash - Walbro 450lpfp - VRSF DPs - VRSF 5" stepped IC - DCI - ER CP w/ Tial BOV - 335is clutch
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08-13-2014, 01:35 PM	#11
mattsy Enlisted Member 0 Rep 33 Posts Drives: 07 335i Join Date: Nov 2012 Location: Hudson, MA iTrader: (1)	Just to go full circle with this thread. Got a set of injectors from ECS (12 index) to swap out all of the injectors. The injector on cylinder 6 had no decoupling element! So obviously someone screwed it up before me. Lame. Anyways, that sound is gone now, car runs better! Will have to get it coded still at some point, but I'm happy.
	Appreciate 0 Quote

08-13-2014, 02:02 PM	#13
mattsy Enlisted Member 0 Rep 33 Posts Drives: 07 335i Join Date: Nov 2012 Location: Hudson, MA iTrader: (1)	I ordered and took the video slightly before I posted this thread. I was committed to the injectors mainly because I had done almost everything else. I thought I lost my mind! Anyways yea, they are actually really easy to install. Without the decouple on cyl 6, the injector was practically falling out. No wonder the car ran like garbage.
	Appreciate 0 Quote