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BMW 3-Series (E90 E92) Forum
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Occasional Cylinder 5 Misfire on high speed
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| 10-11-2020, 02:30 AM | #1 |
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Certified Boost
2
Rep 7
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Occasional Cylinder 5 Misfire on high speed
Hey im getting an occasional misfire on cylinder 5 when in the range of 200km/h lol. 6th gear going 180 if i go heavy on the throttle or even half i get a misfire ALWAYS only on cylinder 5. New ignition coils, ngk’s 97506 2 step colder gapped to .022, could this be the injector in bank 5? It has happened at least 4 times now in cyl 5 only and its a constant misfire so it doesnt go away until i shut the car off. I also have some o2 sensor related codes that only pop up when it misfires: 2C3E, 2C7B, 2C7C. Last time it happened when i started the car back up it was struggling to come alive like barely turned over but i quickly shut it off and tried again and it started up. 2008 BMW 335i, vrsf 5” stepped fmic, inlets, bms chargepipe, cts intakes, mhd stage 2+ 94 oct, catless dps, fbo etc...
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| 10-12-2020, 10:00 AM | #2 |
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Captain
 449
Rep 823
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I would swap coils, then plugs, and then finally injectors. And by swap, I mean I would put cylinder 4 into cylinder 5 and 5 into 4.
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2008 335xi 6MT - 16T China Turbskies - eBay FMIC, DP & CP - VRSF Inlets - SSR DCI's - Walbro 450 LPFP - RFP e85 Tune
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| 10-13-2020, 04:05 AM | #3 | |
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Private
 15
Rep 60
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Quote:
Swap Plug 5 with Plug 6. Swap Coil 5 with Coil 4. Misfire again on 5? Maybe injector Misfire again on 6? Plug Misfire again on 4? Coil |
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| 10-13-2020, 07:44 AM | #4 | |
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Captain
449
Rep 823
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Quote:
__________________
2008 335xi 6MT - 16T China Turbskies - eBay FMIC, DP & CP - VRSF Inlets - SSR DCI's - Walbro 450 LPFP - RFP e85 Tune
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| 10-13-2020, 09:01 AM | #5 |
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Major
 
772
Rep 1,418
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Need logs.
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2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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| 10-14-2020, 07:51 AM | #6 | |
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Second Lieutenant
20
Rep 209
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Quote:
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2008 335xi - JB5 ISO e50, VFSR catless DP, DCI, VFSR FMIC. Fuel it stage 1, VMR V710s. 407/446 rwhp/rwtq.
2004 Cobra - Basic bolt ons with a tune. 450rwhp/rwtq450. Port coming soon. 2013 X5 50i - muffler delete, xHP tune, ESS tune on the way. 2016 Mustang GT Roush Phase 2 with VMP 767 HP kit. |
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| injector, misfire, misfire cylinder 5 |
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