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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 02-21-2015, 01:05 PM   #1
Registered User
Join Date: May 2009
Location: Crestview, Florida
Posts: 743
My Ride: 2006 330CiC/ZHP
Exclamation 0300 code(s), replaced plugs and coils...still broke

I have an 06 330cic ZHP with 113,000 miles on it.

Don't know if this first part is relevant, but more info the better:
Have a valve cover gasket leak, but it's not real bad. I have to add a little oil every now and then.

Added a little -- a little -- too much oil the last time...was BARELY over the high mark.

Drove the car twice, checked oil on a cold (overnight) car to see where the oil was...now it was in the safe range.

Went to start car to go to work the next day and it was idling rough. Put my OBD reader on it and it showed #3 misfiring. Pulled the plug, looked ok. Cleaned it and put it back in. No change.

Figured plugs and coils were prob on last leg, so I took the $225 plunge and bought new NGK "laser" plugs (3199?) and coils.

Did the work this morning. Plugs were ash brown in color, nothing spectacular to report. Coils looked "normal" I guess, although a few (3?) had a little oil residue about halfway up the larger diameter portion of them...like a ring of sticky oil, I'm assuming from the valve cover gasket. Looking down by the plugs, there was nothing -- clean. Plugs all had a little oil (?) on the threads, but plug's "business ends" we're dry.

Started car...still rough if not rougher. Getting misfire codes (030x) for cyls 3, 4, and 5 now.

Looked in Bentleys but I didn't see any kind of troubleshooting tree, just how to replace different components.

This couldn't have come at a worse time...my money is tied up into my son's upcoming wedding in 3 weeks, and on top of that our other vehicle, an older MB ML350 is having some other problem, making me not want to chance driving it either.

Any help would be GREATLY appreciated.

// Radar //
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Old 02-21-2015, 04:15 PM   #2
Registered User
Join Date: May 2009
Location: Crestview, Florida
Posts: 743
My Ride: 2006 330CiC/ZHP
Just replaced my fuel filter and cleaned my MAF...STILL runs like sh!t...
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Old 02-22-2015, 03:04 AM   #3
OEM ///Member
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 22,861
My Ride: 330CiC, M5, X5, E93
Suggest you read the first 2 links below in my signature.

See my "BMW 20 Questions" comments in this thread - http://forum.e46fanatics.com/showthread.php?t=1059972

Search YouTube for Scotty Smoke Test. Do what Scotty does or build a tester from a related video.

I would check the DISA closely and smoke test the intake and crankcase.

My my guess is the DISA/DISA O-ring and the CCV lower oil return line and/or lower intake boot may be an issue.

I would also recommend replacing the fuel pump soon. $125 on your doorstep for an OEM Siemens/VDO pump/sending unit combo from www.bmaparts.com using SPECE30 discount code and standard shipping. Part will probably arrive in 2 days.

My 2006 330cic fuel pump went at 86k miles, but these were mostly city miles.
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 02-22-2015, 09:00 AM   #4
Registered User
Join Date: May 2009
Location: Crestview, Florida
Posts: 743
My Ride: 2006 330CiC/ZHP
Thank you...VERY much!

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coils, misfire, misfires detected, plugs

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