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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)

E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 12-08-2013, 11:52 AM
machtnichts machtnichts is offline
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Location: Boston, MA
 
Join Date: Jan 2009
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Mein Auto: 2007 328xi
2007 65K miles 328xi running very rough

So I just started up my car after about three days leaving it alone. It idles very roughly and has less power. The unevenness lessens at higher speed, but I won't drive it above 25mph until I know what's going on. I suspect a bad spark plug or wire is causing one of the cylinders not to fire. I am getting the yellow 'service engine soon' light, not a more urgent one.

What do we think-
Is it safe to drive? How far, how fast, how long? I have to go to a job 90 miles away tomorrow but there is a good mechanic there I could take it to. Or do I only dare drive it slowly to the local guy? Would a sensor cause a more urgent message if there were a lot of danger, or should I trust my common sense that this is too uneven to drive very far? I know people drive big old V8s with missing cylinders, but I suspect those engines tolerate that abuse much more readily.
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  #2  
Old 12-08-2013, 02:20 PM
EmawBMW EmawBMW is offline
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Location: Wilmington, NC
 
Join Date: Dec 2013
Posts: 12
Mein Auto: 2007 328i
I had this same problem with my 04. Ended up being a problem with one of the intake hoses. Had a hole and sometimes caused the car to shut off. Now I'm sure there are more things that cause this issue but fwiw
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  #3  
Old 12-08-2013, 04:13 PM
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thekurgan thekurgan is offline
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Location: Sacramento, CA
 
Join Date: Jul 2007
Posts: 6,018
Mein Auto: S65B40 Powered
Sounds like the solenoid issues some N52 owner have experienced. Search here and see what you find.
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Old 12-08-2013, 06:04 PM
machtnichts machtnichts is offline
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Location: Boston, MA
 
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Mein Auto: 2007 328xi
It seems like a very consistent unevenness, not like intermittent missing.I still suspect cylinder(s) missing. I think I will rent a car for my trip tomorrow and try to sort it out later this week.
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Old 12-09-2013, 07:22 AM
fdriller9 fdriller9 is offline
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Location: NJ/Philly
 
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Posts: 3,883
Mein Auto: '06 AW 330xi
Scan the dme. Stop guessing. The fault codes will more than likely point you in the right direction.
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Old 12-09-2013, 05:03 PM
machtnichts machtnichts is offline
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Mein Auto: 2007 328xi
It was the ignition coil for cylinder #6. Indy fixed it in an hour.
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Old 12-09-2013, 06:28 PM
R1200 R1200 is offline
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Location: Canada
 
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Mein Auto: 328XiT and R1200C
Good call to rent and not drive that distance with a misfire. Raw fuel entering the catalytic oven creates a blast furnace and big problems.
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