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BMW 3-Series (E90 E92) Forum
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Bad hpfp or lpfp
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12-09-2021, 01:09 PM | #2 |
Major
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Rep 1,230
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Any idea what your fuel pressures look like? From the codes you have there it appears the issue might be related to low fuel levels in the tank potentially starving the fuel pump for fuel.
Do you have a log you can upload to datazap.me so we can see what fuel pressures look like when your misfire starts? |
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12-09-2021, 04:55 PM | #3 |
Second Lieutenant
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Im completely stock no mhd nothing i was trying to. Make sure the engine is running healthy before i flash mhd. Im. Not sure how i can log it for you..
Since those codes from yesterday i filled up the car with jerry can 94 octane . Car has over half tank.. i erased the codes and let it idle for couple mins very rough idle. Also lots of gas came out the tailpipe. And the new codes are That's definitely a hpfp issue right. On the scanners live data i can only see the fuel rail pressure and it was 750 then dipped below 200-300 even all the way to 180... Misfire is consistent on cylinder 6. And it happened suddenly whenn i was mid downtown . I was able to limp it home which is only 12 mins away. I initially thought it was a injector... but i replaced everything cylinder 6 misfire is always there. Not in high rpm or boost as soon i start the car it starts misfiring. |
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12-09-2021, 05:03 PM | #4 |
Lieutenant
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If you planning on going mhd buy the monitor license that way we can view your fuel pressures. Once you are able to see that it should be very obvious what the issue is.
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12-10-2021, 02:49 AM | #5 |
Private
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Alternatively, you should be able to view the live data on a scan tool. Not sure if the one you are using is capable of that. It probably wont make a pretty graph (some can tools do), but you can at least watch the fuel pressure while it runs.
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2007 E90 335xi 6MT w/Sport pkg - Monaco Blue on Saddle Brown - Completely Stock (Changing Soon)
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