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E60 (2004 - 2010)
BMW 5-Series (E60 chassis) was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E60 is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 10-31-2014, 03:17 PM
eshack80 eshack80 is offline
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cylinder 6 misfire....

I have a 2008 528i with 75k miles and last week it started running really rough while driving and at idle. I took it into the shop and they said cylinder 6 was misfiring and needs a new coil. The recommended replacing all coils and sparkplugs. I ended up taking the car home and replaced all coils and spark plugs. It is running the same after I replaced the spark plugs and coils. I took it back to the shop and they said they could reset the codes and see what was going on. It still shows cylinder 6 misfire. Any ideas on what I can do? I have worked on cars for years (classic muscle cars) and when a cylinder had no compression we would put ACdelco upper cleaner and would let it sit overnight on the piston and blow it out the next morning and most of the time that would fix the issue. Please let me know your thoughts.
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  #2  
Old 10-31-2014, 04:34 PM
edes300 edes300 is offline
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You may have a bad injector. You could try switching the coils. If there is a problem with the coil mechanism it should jump to the cylinder that you switch. I would start with that. It could be the harness connected to one of the coils however.
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Old 11-01-2014, 08:16 AM
eshack80 eshack80 is offline
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I just switch the coils and it is definitely the 6th cylinder. any other advice to look for before I take it to the shop??
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  #4  
Old 11-01-2014, 08:36 AM
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boramkiv boramkiv is offline
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So cylinder 6 is still misfiring after you've changed the spark plug, coil, and swapped injectors?
Have you pulled any codes to confirm this?
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Old 11-01-2014, 09:21 AM
eshack80 eshack80 is offline
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I switched the coils again, and hooked it up to a programmer and it is still saying misfire cylinder 6 And the code is 29d2. I have not swapped injectors. Do you think it would be an injector or compression
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Old 11-01-2014, 09:32 AM
edes300 edes300 is offline
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I bet it's the injector. A common problem on n54 engine. Not sure about the n52.
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  #7  
Old 11-01-2014, 09:40 AM
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boramkiv boramkiv is offline
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Once you have changed coils, plugs, swap one injector (remove the fuel rail and swap one of the good injectors with number 6), clear codes and re check the new codes, start the engine and it's still misfiring on cylinder 6...the next thing to do is remove the intake manifold back enough to look into number six cylinder port and make sure your DISA valve didn't come apart and lodge itself above one of the intake valves.

Injectors aren't as big a problem in the N52 as they are N54's, but it cannot hurt to check and this last verification is just about all you can do before stating the obvious.
Basically get ready to take the car to an independent shop for some repairs if you're not handy with tools.
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Old 11-09-2014, 03:59 PM
edes300 edes300 is offline
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Did you find out what the problem was.
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Old 12-15-2014, 11:43 AM
anellamatt anellamatt is offline
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I am having same issue with my 2010 528xi. Mine had cylinder 4 (OBD 304) misfire code. I replaced all spark plugs and still had issue and same code. Now i swapped the coil with Cylinder 1. I also ordered Bosch coil from amazon ($33/piece). Didn't get chance to drive around after swapping. Have to do it today or tomorrow.
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Old 12-15-2014, 10:06 PM
Bud B Bud B is offline
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eshack80 hasn't been around since November 1st.
His problems must have been the Injectors!

Fix the problem and he's gone!

Bud
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  #11  
Old 12-15-2014, 10:27 PM
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Dallasboy1985 Dallasboy1985 is offline
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I have similar problem but I have a N54 not sure if you'll have the injector problem on N52.
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  #12  
Old 12-21-2014, 11:49 AM
anellamatt anellamatt is offline
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Smile Solved!

Bosch coil came in. Replaced cylinder 4 coil. No more misfires!!!! I have to say since i replaced spark plugs during this troubleshooting process, i do feel more power and some sort of better handling experience.

No more active codes for misfire. However i do have evap system not ready. I am gonna drive it for a week and see if it will go away. If not, it's time for a smoke test i guess.
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