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  1. #26
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    Click here to enlarge Originally Posted by themyst Click here to enlarge
    They're all running out of fuel basically. You need a back end flash to support the higher fuel demands of E85. No surprise there.
    this

  2. #27
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    LP sensor won't do anything on this car. When it goes bad it just runs the LPFP at full duty cycle.
    Click here to enlarge

  3. #28
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    Click here to enlarge Originally Posted by themyst Click here to enlarge
    IMO if coils, plugs, valve cleaning and injectors don't fix it, it's a toasted DME. Wasn't there someone who fixed his issues by replacing a transistor on his DME by himself?
    The DME failures I have seen on the forums were generally accompanied by a DME failure code.

  4. #29
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    Click here to enlarge Originally Posted by Big Tom Click here to enlarge
    Can you please tell me WTF is happening with my car...? :S
    I ALWAYS get misfire on cylinder 4, 5 and 6 at the same time @ around 6300 rpm. Before that the car is always running very strong...
    I've changed plugs and coils, but the fault is still there... Every time!
    Coding of the injectors are ok.

    I think it has something to do with the front lambda sensor on bank 2.
    Take a look at the end of the log and you'll see that bank 2 AFR is climbing straight up to the sky... And that's when I get the misfires on cylinder 4, 5 and 6.
    No lambda related codes, only misfire.

    ...or could it be a bad HPFP that is unable to deliver 100% flow at high rpm's?

    I've also logged Fuel Pressure.
    Tell me what you think.


    The log is with a CM10 nozzle and a 50/50 mix of 93 oct and e85.

    http://www.bimmerboost.com/images/im.../misfire-1.jpg
    Does it still happen if the Procede is disabled?

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

  5. #30
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    It happens on map 2 with meth (18psi), on map 1 without meth (14.5 psi) but not on map 0.
    The tip about checking all the earth connections sounds interesting... Will absolutely check that.
    GT-R R35 ​coming up...

  6. #31
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    The plugs looked similar to eachother and the coils was brand new.
    I'll also try reseting the adaptions. Do you think the standard procede adaption reset procedure is enough?
    GT-R R35 ​coming up...

  7. #32
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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    LP sensor won't do anything on this car. When it goes bad it just runs the LPFP at full duty cycle.
    I am not too sure about this Dzenno. When my LP sensor went bad I had misfires on idle and also during wot and my a/f readings were very erractic. The few days prior to it totally failing I was getting misfires at high rpms and car would back fire and injectors would cut off. I wasn't throwing any codes until the sensor finally died. If LPFP was running full duty cycle it would in theory still allow the car to run. IMO switching out the sensor which is a cheap replacement is worth a try. Since I changed out the sensor the idle is back to normal and no signs of slight hiccups during idle And my a/f seems to have stabilized.

  8. #33
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    Click here to enlarge Originally Posted by Big Tom Click here to enlarge
    It happens on map 2 with meth (18psi), on map 1 without meth (14.5 psi) but not on map 0.
    The tip about checking all the earth connections sounds interesting... Will absolutely check that.

    Do you have any other tune you can try? It doesnt do it on map 0, but maybe not relevant as its low loads. Borrow an AP from someone close by and test.
    Both cases hope you get it fixed.
    E92 AT. COBB S2+ , FBOs.

  9. #34
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    Click here to enlarge Originally Posted by Bash Click here to enlarge
    Do you have any other tune you can try? It doesnt do it on map 0, but maybe not relevant as its low loads. Borrow an AP from someone close by and test.
    Both cases hope you get it fixed.
    Tom, you can always borrow mine and run the RACE map and see if you get the same issue. Its quite an aggressive map so if you have an hardware problem it will definetely pop up with that one.
    07 335i AT - MOTIV 750 - MHD BMS E85 - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
    Click here to enlarge

  10. #35
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    Click here to enlarge Originally Posted by enrita Click here to enlarge
    Tom, you can always borrow mine and run the RACE map and see if you get the same issue. Its quite an aggressive map so if you have an hardware problem it will definetely pop up with that one.
    And if all else fails, you can turn off misfire detection with the AP.

  11. #36
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    @Big Tom, try starting a pull at 4500rpm vs 3k rpm like in your log. On my car back then it'd never misfire up there when i start the pull up higher but it'd do it almost consistently if i started it below 4k..as if electrical just didn't have enough juice to keep up
    Click here to enlarge

  12. #37
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    Question

    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    @JamesM3M5 have you seen my thread on this bs?
    No, which one? I did a quick search, not sure what thread you're referring to.
    James Muskopf
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    2007 E92 335i/6MT Procede Rev3 w/PWM meth, otherwise stock
    E28 M5, R171 SLK320

  13. #38
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    Click here to enlarge Originally Posted by JamesM3M5 Click here to enlarge
    No, which one? I did a quick search, not sure what thread you're referring to.
    http://www.germanboost.com/showthrea...isfire-mystery
    Click here to enlarge

  14. #39
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    @Big Tom just curious if you figured out what the problem was?
    [02/07 E92 335i 6MT] - Under Construction

  15. #40
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    Click here to enlarge Originally Posted by nitehawk Click here to enlarge
    @Big Tom just curious if you figured out what the problem was?
    No, not yet...
    I've just finished a tank of 93oct with a bottle of STP Injector Cleaner in, just to try to clean the system after year of e85 usage. I have no bigger expectations though... Click here to enlarge

    Next step is to move the injectors around to see if the fault moves and to check the injector transistors inside the DME.

    ...or just reverse to stock, sell it and buy a GT-R...
    I'm kind of fed up with all the misfires with Vishnu and all the underboost codes with JB...
    GT-R R35 ​coming up...

  16. #41
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    I've also performed a leakdown test and a compression test. Everything was perfect...
    All connectors, cabling and earth points inside the engine compartment are checked. No faults.
    GT-R R35 ​coming up...

  17. #42
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    Sell the car for a $#@!in' injector ??? Come on, be serious !
    E90 335i 6MT
    JB4 G5
    FBO + Meth

  18. #43
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    Click here to enlarge Originally Posted by piele_bps Click here to enlarge
    Sell the car for a $#@!in' injector ??? Come on, be serious !
    So, it's the injector? Thanks for the tip man! Why didn't you told me that earlier? Click here to enlarge
    GT-R R35 ​coming up...

  19. #44
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    Many misfires on the forum lately, but this new wave of misfires do not seem to be solvable by changing plugs and coils and even injectors. My hope is for the DME, it would be a reasonably easy fix. If not, it could be that the engine internals are not as strong as previously thought. But then it would fail a compression test (maybe).

    I would not really wait more than one day to buy an 100EUR injector (www.teile-profis.de for example) and replace it, if needed. Or an 150EUR primary O2 sensor.

  20. #45
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    Click here to enlarge Originally Posted by Big Tom Click here to enlarge
    So, it's the injector? Thanks for the tip man! Why didn't you told me that earlier? Click here to enlarge
    I bet on it!Click here to enlarge
    Of course, assuming that procede in no longer missfiring..
    E90 335i 6MT
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    FBO + Meth

  21. #46
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    Terry had a missfire right after RB. He put a new injector and boooom, car is a rocket with no missfire.

    So, Big Tom, put a new injector and go to that airfield of yours and race. Click here to enlarge
    E90 335i 6MT
    JB4 G5
    FBO + Meth

  22. #47
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    long shot: could it be related to fueling? The LPFP is not up to the task with e85 volume needs. If you look what happened right before the misfire you can see the fuel pressure went up. Thinking of pressure as a restriction, perhaps something happened in the fuel flow... How about decreasing the amount of e85 and increasing the meth amounts to make the living of the fuel pump easier? Does it misfire then?

  23. #48
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    Click here to enlarge Originally Posted by 654 Click here to enlarge
    long shot: could it be related to fueling? The LPFP is not up to the task with e85 volume needs. If you look what happened right before the misfire you can see the fuel pressure went up. Thinking of pressure as a restriction, perhaps something happened in the fuel flow... How about decreasing the amount of e85 and increasing the meth amounts to make the living of the fuel pump easier? Does it misfire then?
    I've already tried 100% 93oct combined with a 93oct-map, with the same results... With and without meth.
    GT-R R35 ​coming up...

  24. #49
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    Click here to enlarge Originally Posted by piele_bps Click here to enlarge
    Terry had a missfire right after RB. He put a new injector and boooom, car is a rocket with no missfire.

    So, Big Tom, put a new injector and go to that airfield of yours and race. Click here to enlarge
    Yes, that's my next step, IF I haven't bought a GT-R before! (I'm mailing the seller as we speak... Click here to enlarge )
    GT-R R35 ​coming up...

  25. #50
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    1 out of 1 members liked this post. Yes Reputation No
    Dam I really hope you find out what the problem is cause this is pretty unnerving.

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