ECU issue?
  • Login:

Welcome to the CBRXX.com.

Register ButtonIf this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.


Page 1 of 2 12 LastLast
Results 1 to 15 of 30
Like Tree4Likes

Thread: ECU issue?

  1. #1

    Member #
    38001
    Join Date
    Jul 14 2019
    Posts
    11
    Liked
    0 times

    ECU issue?

    First of all, thanks for adding me here!

    I own CBR1100XX from 2007 and I`m really close to lose my s&*^
    No faults found in ECU.
    Bird running "fine" on cold engine and smooth reaction on throttle.
    Engine heats up fine up till 80/90C. After reaching to a working temperature and opening a throttle, engine starts misfiring.
    Fault is easy to hear just over 2000rpms and you can see the drops about +/-200rpms. (sounds like to late/early ignition). On higher revs due to counterweight of crankshaft not to clear anymore but still not smooth.
    No power lose and reaching high revs really quick.

    So far I try:
    a spark plugs(old has normal color), valve clearance - check and adjustment, clean and check injectors, clean and balance throttle bodies, set up TPS with color-tune plugs, check voltage and resistance on coils, I got my friend to come down with oscilloscope to check signal from pulse generators but cant really compare it to anything but he said that it doesn't look unusual, charging voltage +/-14,3V.
    New ECM cost around 900e plus setting up HISS on top of that. So you know yourself...

    Sorry for my English guys. It's not my native language

  2. # ADS
    Sponsor
    Join Date
    Always
    Posts
    Many

    CBRXX.com is the original Honda CBR1100XX Super Blackbird community! Registered Users do not see these ads. Please Register - It's Free!


  3. #2

    Member #
    462
    Bike(s)
    99 CBRXX
    Join Date
    Nov 27 2006
    Location
    Thailand
    Posts
    836
    Liked
    73 times

    Re: ECU issue?

    Vaccum pipe leak (the little small pipes back of the Throttle body sometimes they split) FPR diaphram leaking connected to vacuum pipes (search forum), fuel filter (inside tank) blocked, faulty fuel pump, TPS (throttle position sensor) - clean it

    Tank vent blocked causes fuel starvation - open tank filler should immediately cure the problem for a short time

    IMO in that order
    Krisbiker2 likes this.

  4. #3

    Member #
    19715
    Bike(s)
    CBR 1100xx
    Join Date
    Mar 10 2015
    Location
    england
    Posts
    148
    Liked
    52 times

    Re: ECU issue?

    Hi There,
    Sounds like you've already checked alot of things!

    Is there any history to when the fault started?

    Have you checked the auto choke (wax unit) is working?
    Not as extreme as this but checking the FPR is worth a look as well as this wasn't to dissimilar to my FPR issue but like I say yours is more extreme.

    Theirs a lot of knowledgeable guy's on here so I'm sure more advice will come :-)
    Roses are red, violets are blue, I'm schizophrenic, and so am I.

  5. Remove Advertisements
    CBRXX.com
    Advertisements
     

  6. #4

    Member #
    38001
    Join Date
    Jul 14 2019
    Posts
    11
    Liked
    0 times

    Re: ECU issue?

    "Have you checked the auto choke (wax unit) is working?"
    Looks like its working correctly and its adjusting revs when cold.

    I just not get idea how "
    Vacuum pipe leak , FPR diaphragm leaking connected to vacuum pipes , fuel filter blocked, faulty fuel pump, TPS - clean it" or tank vent blocked
    could be related to different temperature? I mean, problem occur when bike is in his working temp but not when cold?
    I don't think a fuel starvation could be a problem if bike is reaching the full revs and didn't lose any power.

    I'll change all vacuum pipes just to be on safe side. What about aftermarket FPR? I heard that is quite hard to get one with higher psi rate? maybe from other bike?
    Last edited by UndeadRider; 07-15-2019 at 10:47 AM.

  7. #5

    Member #
    19715
    Bike(s)
    CBR 1100xx
    Join Date
    Mar 10 2015
    Location
    england
    Posts
    148
    Liked
    52 times

    Re: ECU issue?

    I wouldn't buy anything just yet as that's how bikes become money pits and you get fed up.

    If you do a search on here on the FPR there is a test, I think it was taking the vacuum pipe off the FPR and seeing if you can smell petrol.

    Have a good search on here and I am positive you will find a resolution or a good pointer before shelling out your hard earned.
    Roses are red, violets are blue, I'm schizophrenic, and so am I.

  8. #6

    Member #
    462
    Bike(s)
    99 CBRXX
    Join Date
    Nov 27 2006
    Location
    Thailand
    Posts
    836
    Liked
    73 times

    Re: ECU issue?

    all the wax unit does is hold the throttle open for longer - totally unrelated - you could do the same thing with you right hand


    you don't nee to replace all the pipes - just check them for leaks/splits - it is a common problem

    you have already ruled out ignition so the only other thing involved is fuel delivery - and there are a lot of things involved in that that I mentioned above

  9. #7

    Member #
    28273
    Bike(s)
    2000 blackbird
    Join Date
    May 25 2017
    Location
    new orleans
    Posts
    361
    Liked
    126 times

    Re: ECU issue?

    Agree with Geoff's assessment with a few adds:
    1. Exhaust leak when hot

    2. Some electrical component that works fine when tested with meter (when part is cool) fails when it warms up. Such as spark plug, coil, spark plug wire, fuel pump relay, a ground wire etc.

  10. #8

    Member #
    38001
    Join Date
    Jul 14 2019
    Posts
    11
    Liked
    0 times

    Re: ECU issue?

    What do you mean by Exhaust leak? Valves?
    I don't think exhaust itself could be cause of that kind of issue. Its a OEM exhaust and the fours stroke wouldn't be that sensitive for some holes in the system, plus i did try to eliminate a Lambda sensor already with no luck.
    How could you check for example Coils when hot? Heat up bike disconnect coils put them on table and check resistance again when hot?
    I'm surprised I forgot about hot coils issue.

    Is there quick way on checking FPR? That sound like a common issue on older birds.

  11. #9

    Member #
    28273
    Bike(s)
    2000 blackbird
    Join Date
    May 25 2017
    Location
    new orleans
    Posts
    361
    Liked
    126 times

    Re: ECU issue?

    When hot, check for exhaust leaks from the cylinder head to the collector, also intake leaks at the throttle body rubber boots . This can definitely cause poor running. Check Gadgey's post above for FPR check.
    Best way to check ignition components is to replace (one at a time) with known good. Very difficult to replicate real world conditions on the bench

  12. #10

    Member #
    38001
    Join Date
    Jul 14 2019
    Posts
    11
    Liked
    0 times
    I follow your advice and find that it is actually fuel starvation.
    In 10sec I should get around 200ml of petrol on return hose. I got around 100ml only.
    I clamped off return hose to check if rising pressure will make any difference.
    Bike start running smoothly again after closing return hose.
    Because older birds had problems with FPRs and I dont have a pressure gauge to check the pressure in the system I ordered a new FPR. I chanced it and I was wrong.
    After replacing fpr bike still runs bad unless I close off return hose.
    Any directions for new fuel pump?

  13. #11

    Member #
    20884
    Bike(s)
    2000 Bird - 2 RSV Milles - CBR600RR
    Join Date
    Nov 06 2015
    Location
    Worcester UK
    Posts
    3,117
    Liked
    1103 times

    Re: ECU issue?

    Where are you located? You can buy aftermarket replacement motors for them.
    carpe diem

  14. #12

    Member #
    16478
    Bike(s)
    99 CBR11000xx, Honda F501 RotoTiller
    Join Date
    Jul 03 2013
    Location
    Corpus Christi Texas
    Posts
    2,276
    Liked
    1130 times

    Re: ECU issue?

    Here you go from Cheap Cycle parts. OEM
    https://www.cheapcycleparts.com/oemp..._content=honda

    STex
    adeyren likes this.
    Came into this world with nothing and still have it all.

  15. #13

    Member #
    38001
    Join Date
    Jul 14 2019
    Posts
    11
    Liked
    0 times
    Sorry I didn't specify that. I'm based in Ireland.

  16. #14

    Member #
    20884
    Bike(s)
    2000 Bird - 2 RSV Milles - CBR600RR
    Join Date
    Nov 06 2015
    Location
    Worcester UK
    Posts
    3,117
    Liked
    1103 times

    Re: ECU issue?

    Try cleaning the filter first. Simple job.
    carpe diem

  17. #15

    Member #
    762
    Bike(s)
    2000 CBR1100XX
    Join Date
    Jan 15 2007
    Location
    SOUTH AUSTRALIA
    Posts
    38
    Liked
    9 times

    Re: ECU issue?

    Change the filter first.


 
Page 1 of 2 12 LastLast

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Tags for this Thread