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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
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#12
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I installed the newly-designed coils which is 0 221 504 464. When you said adding silicon lube to the top rubber boot, are you referring to the Part D (attached pic)? I've seen people adding something paste (can't remember what was that!) to the hole of Part A on YouTube. Does that help or necessary too? I though about my BMW scanner 1.4 that I used years ago. Does the scanner able to tell if the problem related to ignition or fuel injector? |
#13
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Don’t drive the car while it’s misfiring. It can damage to the engine over time.
You can grease the inside of part D or Where E would start. Not the shaft. It’s a sealing surface to keep water out of the spark plug well. Do it lightly, just to get it to slide down. Don’t grease part A. They were using boot grease or dielectric grease. It causes problems and isn’t necessary with the new technology. (It’s good for old school cap and rotor systems. ) You’ll know when it’s all the way down and facing the right direction.
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2005 X5 4.4i SterlingGrau, Sport Package, DSP Build 3/12/2005 |
#14
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Are you getting any other codes? Or: have codes started to migrate to particular cylinder? If you get enough misfires on a cylinder the computer will shut off that cylinder and the car will have little power and shake like crazy.
Wife's car we as only tripping misfires a couple times a week and an hour or two of driving with the cleaner seems to have done the trick. Your symptoms are 3-4x as bad and you've driven not enough to even get the temp to equilibrium. That said, I also replaced the two coils from the cylinders that acted up the most. So keep reading codes and see if you can find a cylinder that misfires the most is likely a weak coil. Also: take out the plugs and clean them if they are gummy.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#15
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Have to drive to work the injector cleaner through but at constant higher speed where it won't miss.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#16
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#17
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P0300: Random/Multiple Cylinder Misfire Detected P0301: Cylinder 1 Misfire Detected P0304: Cylinder 4 Misfire Detected P0305: Cylinder 5 Misfire Detected All the spark plugs are new and replaced just about 2 weeks ago. |
#18
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2005 E53 4.4i N62 Misfire Help!
Two weeks plenty of time to gum up plugs if the engine is not running properly. You need to check at least a couple of the cylinders with the misfires.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#19
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Finally, I solved these 3 misfires that never go away after replacing new coils & spark plugs.
Over the weekend, I pulled out those misfire coils & spark plugs, applied some lube, re-seated them, cleared code & fire up the engine. The misfire went down from 3 errors to 1 error (cylinder 1). Pulled out the coil 1 and re-seated it repeatedly but no luck. I went back to old coil but working. I was about to get a replacement for coil 1 and an idea came into mind that I should give a final test by switching the coils between cylinder 1 & 2. Surprisingly, the coil 1 is working in cylinder 2. Thanks you all for giving me all the valuable advice & suggestions. If not, I would have ripped off by stealers for this simple solution. |
#20
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Thanks for the update. It helps the rest of the community to hear of successful fixes, so we know what works.
Good idea of swapping the coils between cylinders. That’s an excellent method of function verification.
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2005 X5 4.4i SterlingGrau, Sport Package, DSP Build 3/12/2005 |
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coil, fuel injector, misfire, n62, spark plug |
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