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Misfire on low RPM's/cruising, fine under moderate+ load
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01-17-2021, 12:17 PM | #23 | |
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Looks like excess fuel leaking from injectors causing the black soot build up on plugs. You probably have to change all the injectors, |
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01-17-2021, 12:25 PM | #24 | ||
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01-17-2021, 02:51 PM | #25 | |
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If the tip has carbon deposits then the injector is likely clogged. If the plugs smell of fuel, even a little, then the injector is likely leaking. Last edited by Saif2018; 01-17-2021 at 03:02 PM.. |
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01-17-2021, 04:10 PM | #26 | ||
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01-17-2021, 08:04 PM | #27 | ||
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01-18-2021, 05:28 PM | #28 | |
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I'd also recommend Walnut blasting it anyway, if it's never been done, more than likely you have significant carbon build up |
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01-19-2021, 09:27 PM | #29 | ||
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01-20-2021, 01:47 AM | #30 | |
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Some have reported this worked for them, leaving tips dipped in some all purpose cleaner for a few hours then cleaning it off properly, with carb cleaner spray, and refitting them afterwards. Injector seals should be changed as well. Will need this tool or a similar one to do it properly... https://www.ecstuning.com/b-schwaben...SABEgLJJfD_BwE Budget on Walnut blasting and possibly Index 12 injectors. I'd like to see how effective something like this is though, https://injector-rehab.com/product/b...-flow-testing/ Last edited by Saif2018; 01-20-2021 at 07:14 AM.. |
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01-20-2021, 02:04 AM | #31 |
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make sure to change the seals and couplers on the injectors since you pulled them out
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2007 E92 335i / FBO + Inlets / E85 Custom Tune by WedgePerformance / 9.68 @ 140 / TPC Stage 2 19T / 2.1s 0-60 mph / 2010 535Xi 6MT - 437M - MHD / Instagram @Silent9n54
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01-20-2021, 08:16 AM | #33 | |
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01-26-2021, 07:37 PM | #34 | ||
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01-27-2021, 04:24 AM | #35 |
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Have you Walnut blasted first? and see if it makes a difference, (I would do the cheaper stuff first)
Last edited by Saif2018; 01-27-2021 at 05:18 AM.. |
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01-27-2021, 07:03 AM | #36 | |
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01-29-2021, 07:58 PM | #37 |
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UPDATE
I swapped bank 1 injectors with bank 2 and coded them, first few minutes of driving it seemed fine then parked it and took it back out a few minutes later then started doing the stutter again, bank 2 was still doing the stutter and not so much bank 1, I've pretty much rulled out injectors considering it's only been bank 2, and it can't be 02s cause I've just replaced them, I also swapped bank 1 coils with bank 2 but still didn't work, I don't know what else Is left other than a walnut blast
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01-30-2021, 03:43 AM | #38 | |
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Im going to try swapping throttle body since i have a spare and inspecting the gasket there, see if it makes a difference. I have tried swapping a bunch of things with my other N54 and it still has the same stutter at low rpm. Vanos solenoids, boost solenoids, diverter valves, plugs, coils. I did feel a slight improvement when i reset the throttle adaptation for a short period of time.
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01-30-2021, 09:12 AM | #39 |
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01-30-2021, 07:02 PM | #40 | |
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01-31-2021, 04:46 AM | #41 | |
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01-31-2021, 08:46 AM | #42 | ||
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01-31-2021, 11:41 AM | #43 | |
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01-31-2021, 12:28 PM | #44 | ||
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