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Old 02-24-2017, 06:25 PM   #1
Bmw323i_
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Join Date: Feb 2017
Location: San Bernardino
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My Ride: 2000 323i
Cylinder 6 Misfire! Rough Idle

I was driving my 2000 323i manual transmission today and the SEL light came on when I was pulling up to my driveway. I parked the car and noticed that the car had a rough idle. (I did not check the rpm). I checked the code which was cylinder 6 misfire.

HERE is the weird part.. As soon as I erased the code the rough idle went away..

This just happened today so I haven't swapped the coils to see if its a bad coil. I just bought a disa valve rebuild kit so I will be doing that soon. I just wanted to know if anybody has had this specific problem where erasing the code made the rough idle disappear. Or if you guys have any theories of ideas.

after the disa valve I am going to wait until the code pops up again. If it does ill swap the coils. if its not the coil ill swap and inspect the spark plug. If both are good ill check the compression. if compression is good I will be confused as f***
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Old 02-24-2017, 06:54 PM   #2
ben325I
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Join Date: Dec 2015
Location: Socal / Orange County
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My Ride: 02 325i / 00 323i
I'm guessing coils. Same exact thing happened to me a month ago. Cyl#6 misfire p0306 was the code. I turned it off then everything was fine. I replaced the plugs a few months back and I knew coils were going to be needed shortly since they were original. I ordered the coils and everything has been fine since being replaced. I've put on 2k miles since and so far so good.

Last edited by ben325I; 02-24-2017 at 06:55 PM.
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Old 02-24-2017, 07:13 PM   #3
sroberts
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Join Date: Aug 2010
Location: Peachtree City, GA
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My Ride: 2000 323ci
I had a bad coil in my 2000 323ci but the car would only start misfiring after it had warmed up. I swapped it and had the same behavior on a different cylinder. A new set of coils and the car runs great.
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Old 02-25-2017, 03:35 AM   #4
Bmw323i_
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Good to know! I hope it is the coils then I wont have to worry about it being super complicated.
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Old 02-26-2017, 11:52 AM   #5
gonzo08452
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Location: Yorba Linda, CA
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My Ride: 323 and 325 5spd
Rockauto.com has a set Bosch coils that is labeled OE for $256 including boots for a 2000 323i. Not a bad deal. They also have some listed as little $28 which probably isn't recommended. Fyi....
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Old 02-26-2017, 12:31 PM   #6
tritron
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Amazon has bosch coils for $21
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Old 02-26-2017, 12:31 PM   #7
tritron
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Quote:
Originally Posted by sroberts View Post
I had a bad coil in my 2000 323ci but the car would only start misfiring after it had warmed up. I swapped it and had the same behavior on a different cylinder. A new set of coils and the car runs great.
Did you get smoke due to misfire ?
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Old 02-26-2017, 01:55 PM   #8
BaliDawg
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Quote:
Originally Posted by tritron View Post
Amazon has bosch coils for $21
Those are for 09/2002 and newer.
https://www.amazon.com/Bosch-0221504...2004+bmw+325ci

Amazon listing for Bosch coil for OP's 2000 323i (08/2002 and older).
https://www.amazon.com/Bosch-00143-0...+2000+bmw+323i
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