Engine Stuttering

kosmokratur · 07-11-2022, 09:55 AM

Greetings all.

Yesterday, I was thinking about how smoothly my 2018 M550 was running. Seconds later, the "Drivetrain malfunction" indicator/chime came up. Within a minute, the engine as stuttering/chugging fairly intensely. I turned it off and restarted it, and the symptoms were gone. Momentarily, the fault indicator was replaced by "CHECK OK All systems OK." Any ideas what this was? At approx. 55K miles, is this a subtle hint that it is time for new plugs and coils? I'd enjoy entertaining any speculation!

AP · 07-11-2022, 10:57 AM

Not a mechanic but assume if you could get access to a one reader , it will have logged some faults to give you a better idea

Speculation (again I'm not a mechanic so just an uneducated guess!)

Fuel contaminated?

If under warranty I would certainly get the dealership to see if they can read any error codes if it

If out of warranty , that's going to cost unless you think it was a one off

Joe-BMW33 · 07-11-2022, 10:59 AM

Definitely try and read the codes. A reader is fairly cheap and should be in your toolbox anyway.

From my experience, BMW's don't fix themselves, this will return at some point.

kosmokratur · 07-11-2022, 11:03 AM

I bought one a couple weeks ago but still waiting for it to arrive.
I dont think my old Peake FCX for my e39 would help with this

Joe-BMW33 · 07-11-2022, 11:58 AM

Quote:

Originally Posted by kosmokratur

I bought one a couple weeks ago but still waiting for it to arrive.
I dont think my old Peake FCX for my e39 would help with this

Nope. Unfortunately, my new readers won't work on my E39. The newer ones work on the F/G chassis only I think. Worth a shot though?

HerkHealer · 07-11-2022, 12:27 PM

Quote:

Originally Posted by kosmokratur

I bought one a couple weeks ago but still waiting for it to arrive.
I dont think my old Peake FCX for my e39 would help with this

If you're still driving it, just take it to any Autozone, Advance Auto, Pep Boys, etc. They will scan for free and tell you the code.

530iDriver · 07-11-2022, 03:59 PM

Have you replaced your spark plugs and coil packs?

kosmokratur · 07-23-2022, 06:52 AM

So I got codes for misfires on cyl. 2, 3 and 4.
I'm going to the "$tealer" on Weds anyway, so I'll see what they say about this.

BMW012 · 07-23-2022, 08:45 AM

please keep us posted.

HerkHealer · 07-23-2022, 09:52 AM

Quote:

Originally Posted by kosmokratur

So I got codes for misfires on cyl. 2, 3 and 4.
I'm going to the "$tealer" on Weds anyway, so I'll see what they say about this.

I'm curious to what they say. Please post what the Dealership tells you.

Usually, a misfire caused by a faulty plug or coil is just one cylinder. You have 3 misfiring. It could be that they all failed at once, but I think chances are slim on that one.

I dont know if you're still driving the car with this happening, but I would advise against it. You can destroy your catalytic converters with an engine misfiring. The ECU will dump more fuel during a misfire and raw/unburnt fuel will clog your Cat up.

kasrar · 07-23-2022, 04:38 PM

Quote:

Originally Posted by kosmokratur

Greetings all.

Yesterday, I was thinking about how smoothly my 2018 M550 was running. Seconds later, the "Drivetrain malfunction" indicator/chime came up. Within a minute, the engine as stuttering/chugging fairly intensely. I turned it off and restarted it, and the symptoms were gone. Momentarily, the fault indicator was replaced by "CHECK OK All systems OK." Any ideas what this was? At approx. 55K miles, is this a subtle hint that it is time for new plugs and coils? I'd enjoy entertaining any speculation!

I've got the same problem as you, but in my 2016 750i. Regardless, they share the same engine. Recently changed my spark plugs at 90,000 kms (now at 97,000 kms) but have not done coils yet. I used ISTA to read the codes and they all seem to have to do with the high pressure fuel pump. I believe this is a high pressure fuel pump issue and I've got it on the same cylinder bank as you.

Anyone know if this is an easy or difficult DIY? What do you have to remove to access it? ISTA recommends removing lotssss of parts including lots of the cross connections, but I don't think that's necessary.

kosmokratur · 07-27-2022, 10:21 PM

I had a busy visit with the dealer today. The technician thought my misfire episode had been caused by aging plugs; they offered to replace the 8 plugs for $729. He recommended keeping the coils in service because they are upgraded Delphi parts as opposed to the original Bosch ones (the PO must have had them changed out).
They tried to get this done as a CPO repair but apparently the CEL light has to actually be on when in their custody. Drat.

07-11-2022, 09:55 AM	#1
kosmokratur Second Lieutenant 142 Rep 252 Posts Drives: 2018 M550, '00 750, '97 540,.. Join Date: Aug 2019 Location: Finger Lakes, NY iTrader: (0)	Engine Stuttering Greetings all. Yesterday, I was thinking about how smoothly my 2018 M550 was running. Seconds later, the "Drivetrain malfunction" indicator/chime came up. Within a minute, the engine as stuttering/chugging fairly intensely. I turned it off and restarted it, and the symptoms were gone. Momentarily, the fault indicator was replaced by "CHECK OK All systems OK." Any ideas what this was? At approx. 55K miles, is this a subtle hint that it is time for new plugs and coils? I'd enjoy entertaining any speculation!
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07-11-2022, 10:57 AM	#2
AP Major General 2799 Rep 5,118 Posts Drives: G30 M550 Join Date: Apr 2011 Location: UK iTrader: (0)	Not a mechanic but assume if you could get access to a one reader , it will have logged some faults to give you a better idea Speculation (again I'm not a mechanic so just an uneducated guess!) Fuel contaminated? If under warranty I would certainly get the dealership to see if they can read any error codes if it If out of warranty , that's going to cost unless you think it was a one off
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07-11-2022, 10:59 AM	#3
Joe-BMW33 Major General 7415 Rep 6,805 Posts Drives: '18 M550i\|'21 X5\|'03 540i Join Date: Apr 2021 Location: Boston iTrader: (1) Garage List 2013 VW Tiguan [0.00] 2015 Infiniti QX60 [0.00] 2021 BMW X5 [0.00] 2003 BMW 540i [0.00] 2018 BMW M550 [10.00]	Definitely try and read the codes. A reader is fairly cheap and should be in your toolbox anyway. From my experience, BMW's don't fix themselves, this will return at some point. __________________ 2018 M550ix\|Carbon Black\|Dinan Modifications\|2003 540i\|Jet Black\|M-Sport\|2021 X5 Mineral White Prior BMW's: 1987 325e\|1993 740i\|1998 740il\|2001 530i\|2002 745li\|2007 750li\|2006 750li\|2001 530i\|2012 535xi\|
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07-11-2022, 11:03 AM	#4
kosmokratur Second Lieutenant 142 Rep 252 Posts Drives: 2018 M550, '00 750, '97 540,.. Join Date: Aug 2019 Location: Finger Lakes, NY iTrader: (0)	Reader is in the mail I bought one a couple weeks ago but still waiting for it to arrive. I dont think my old Peake FCX for my e39 would help with this
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07-11-2022, 03:59 PM	#7
530iDriver Colonel 1708 Rep 2,539 Posts Drives: 2017 BMW 530i Join Date: May 2018 Location: Florida iTrader: (0)	Have you replaced your spark plugs and coil packs? __________________ 2017 BMW 530i, Sport Line,Alpine White, Canberra Beige Sensatec, 19 inch V-Spoke wheels, basic plain Jane build with no options whatsoever..... "Less is more". Before: 2011 BMW 328i E90 sedan, Platinum Bronze Metallic, Dakota Brown leather, 17 inch wheels, 6-speed auto, N52 6 Cyl inline N/A goodness....
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07-23-2022, 06:52 AM	#8
kosmokratur Second Lieutenant 142 Rep 252 Posts Drives: 2018 M550, '00 750, '97 540,.. Join Date: Aug 2019 Location: Finger Lakes, NY iTrader: (0)	So I got codes for misfires on cyl. 2, 3 and 4. I'm going to the "$tealer" on Weds anyway, so I'll see what they say about this.
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07-23-2022, 08:45 AM	#9
BMW012 Major 1009 Rep 1,185 Posts Drives: 2023 M550i CBM/Ivory Join Date: Nov 2021 Location: NJ iTrader: (0) Garage List 2025 X6 BG/Silverstone [0.00] 2023 M550i CBM/Ivory [0.00]	please keep us posted.
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07-27-2022, 10:21 PM	#12
kosmokratur Second Lieutenant 142 Rep 252 Posts Drives: 2018 M550, '00 750, '97 540,.. Join Date: Aug 2019 Location: Finger Lakes, NY iTrader: (0)	I had a busy visit with the dealer today. The technician thought my misfire episode had been caused by aging plugs; they offered to replace the 8 plugs for $729. He recommended keeping the coils in service because they are upgraded Delphi parts as opposed to the original Bosch ones (the PO must have had them changed out). They tried to get this done as a CPO repair but apparently the CEL light has to actually be on when in their custody. Drat.
	Appreciate 0 Quote