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BMW 3-Series (E90 E92) Forum
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OFT stg1, misfire, solved
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| 02-03-2014, 11:46 AM | #1 |
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OFT stg1, misfire, solved
Long story short:
Got cel, checked codes, misfire multiple cylinders and then many misfires on cyl 5. Triggered CEL. After this only rough running under acceleration, no cel but misfires in cyl 5 logged. Flashed stock rom (was running stg1) Misfires gone. Changed plugs & coils, flashed back stg1, no misfires. Smoother idle. This just as a reminder that your tuned N54 needs to have ignition parts in good condition. |
| 02-03-2014, 11:50 AM | #2 |
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Chief Executive
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Drives: 2008 335xi 6spd Coupe
Join Date: Dec 2007
Location: Boston
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Plugs probably would have done it alone. 10k-15k seems to be the top of the tuned lifespan of plugs on this platform.
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| 02-03-2014, 12:07 PM | #3 |
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Possibly, but then again the coils cost me about the same as plugs did (25 eur each, ~34usd). I don't have easy garage access so decided to change both at once.
Car has done 100k km / 62k miles so if the coils weren't done they soon would have. |
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