Spark plug issues?

[///Gunner]

After tuning my car to BM3 stage 1, and making a couple of hard pulls, I got the following:

- Drivetrain malfunction: Drive moderately. Maximum drivetrain output not available.

After running the diagnostic, I got the following from BM3:

- 140010 misfires, More cylinders: recognized.
- 140610 misfiring, Cylinder 6: recognized.
- 140001 misfires, more cylinders: injection switch off.
- 140601 misfires, cylinder 6: injection switch off.

I got my spark plugs changed at around 27,000 miles (under maintenance plan), I am not at 37,000 miles. Do I need to change my spark plugs or am I looking at a different issue? Thanks in advance!

[TopJimmy]

What exactly happened when the errors popped up, and what did you hear/feel?

One of your spark plugs may be unhappy but I'm not sure. Do you have a data log of what happened?

Does the car run fine at idle?

[///Gunner]

Originally Posted by TopJimmy

What exactly happened when the errors popped up, and what did you hear/feel?

One of your spark plugs may be unhappy but I'm not sure. Do you have a data log of what happened?

Does the car run fine at idle?

When I stepped hard on the pedal, I felt 'like' a misfire/rattle after like 260hp, then I got the malfunction message. After running the diagnostic, I got the codes. It has happened to me twice so far (same codes and car feeling). no issues at iddle, it is only when I step hard on the pedal.

Im not too familiar with data logs.

[TopJimmy]

Originally Posted by ///Gunner

When I stepped hard on the pedal, I felt 'like' a misfire/rattle after like 260hp, then I got the malfunction message. After running the diagnostic, I got the codes. It has happened to me twice so far (same codes and car feeling). no issues at iddle, it is only when I step hard on the pedal.

Im not too familiar with data logs.

You should read the PTF instructions and collect a data log of the problem happening. I think your plug#6 might be a little wide. Logs will tell where to look, so collect one and then post the web link here.

[Ovrtim4]

Same thing happened to me I have a 2015 m4 I hit 174 mph. Catless downpipes and jb4 tune map 2. It was my injectors and spark plugs. I got them changed out and the car were is running even better.

[Ovrtim4]

Is this codes u got?

[///Gunner]

Originally Posted by Ovrtim4

Is this codes u got?

Yup! Same codes, except for the downpipes…. Im thinking same thing, change out the spark plugs…. Maybe a good time to upgrade to NGK 97506??

[Ovrtim4]

Yea that's wat I did but I also changed my injectors at the same time

[///Gunner]

Originally Posted by Ovrtim4

Yea that's wat I did but I also changed my injectors at the same time

Do you have a part number? And did you only do injector #6?

[Ovrtim4]

Bosch BMW EU6 Fuel Injector Kit - 13648625397KT

[Ovrtim4]

From my understanding Bosch makes Bmw parts. So I didn't go with genuine Bmw injectors.

[Ovrtim4]

I changed them all Bc turns out when they hooked up the computer it was reading misfire in cylinder 2 4 6

[TopJimmy]

Injector job is more involved, but it IS right there as you are doing plugs. It's a couple hundred for an injector set so buy from FCP Euro. You need the special tool to install them, and a very fine torque wrench.

[hellokitty]

Cyl 6 usually runs the hottest so I would change out the coil and replace all spark plugs with NGK 97506 gapped at .022

[HHM3]

Hi, I have the exact same issue and plan on taking it to BMW next week. Can I ask if you figured out what the issue was? I’m getting the same cylinder 6 combustion misfire.

[hellokitty]

Originally Posted by HHM3

Hi, I have the exact same issue and plan on taking it to BMW next week. Can I ask if you figured out what the issue was? I’m getting the same cylinder 6 combustion misfire.

Replace spark plugs and/or coil packs and that should do it.

[///Gunner]

Originally Posted by HHM3

Hi, I have the exact same issue and plan on taking it to BMW next week. Can I ask if you figured out what the issue was? I’m getting the same cylinder 6 combustion misfire.

I bought the one coil (to replace cylinder #6) and im also replacing all the spark plugs with NGKs, but I haven't had the time to replace them yet….

[///Gunner]

I just finished replacing the coil on cylinder #6 and also upgraded all the spark plugs to NGKs (gapped at .23)…. Cylinder #6 was indeed the problem, the coil was not pushed in all the way, somehow it back itself out and when I removed the coil, there was white powder on the plug and coil looked burned. After the replacement of the coil and upgrade of the spark plugs, the initial codes cleared. I am happy the initial issue was resolved but now im getting a new code I didnt have before, 140011. I wonder if this has anything to do with the NGKs? Or the gap? Any advise is highly appreciated…

[FriedPiston]

140011 is for Fuel Injection deactivation. It's related to 140601 and 140010.

Faulty spark plug or coilpack very seldom triggers a fuel injection deactivation, if ever. It's almost always a faulty injector that causes this condition. Premature injector failure on Cyl 6 is fairly common on the S55.

[///Gunner]

Originally Posted by FriedPiston

140011 is for Fuel Injection deactivation. It's related to 140601 and 140010.

Faulty spark plug or coilpack very seldom triggers a fuel injection deactivation, if ever. It's almost always a faulty injector that causes this condition. Premature injector failure on Cyl 6 is fairly common on the S55.

Thanks for the info. All codes have now cleared. I will continue to monitor and hope to never see these codes again! 🤞🏼

[slaughter.mode]

Wow that thing is cooked. Never seen a coil get toasty like that.