Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test
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Thread: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

  1. #1

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    Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Hi all, looking for some information regarding my mates bike, CBR1100XX '02, which has been an utter pain over the last year, with issue after issue really

    Latest development, briefly, the bike was running lean and like a bag of hammers under load, so he done a fuel flow test (as in the manual) which showed just over 100ml in the 10 second test. Woeful, as it should be a minimum of 220ml. So, new pump & filter were fitted. Tested again, and approx 300ml in the 10 second test - a fantastic improvement.

    However, when all fitted back together, ignition on & kill switch on run, the pump will not prime, no sound at all - and also, the high beam, tail-light, and number/licence plate lights respectively, do not work. Brake light, main beam, and indicators are working fine.

    I've been searching on the forum and have found two mentions of the perils of this test, whereby, possibly when using a jumper it has inadvertently been put on incorrectly at some point, and therefore has apparently bust the ECM.

    (The threads referencing this are here: https://www.cbrxx.com/engine-airbox-...arting-up.html & post #15 here: https://www.cbrxx.com/engine-airbox-...usb-pipes.html).

    Do you Bird gurus believe this is what has happened here? Or could there be any other explanation? Assuming that the ECM has been damaged, is this also responsible for the lighting issues that have only just appeared since the pump/filter change, and fuel flow test was carried out?

    The bike did fire up and run before the jumper/flow test was done, but since then only the symptoms written above are evident. Fuses and relays seem to be fine, but will test properly with a multimeter. Direct power to the pump and it happily works away.

    Any pointers in what to check out would be very gratefully received.
    Last edited by Shed; 07-20-2019 at 1:58 PM.

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  3. #2

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    10amp fuse

  4. #3

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Yep check fuses first.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

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  6. #4

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Thanks for the replies guys, I'll check these out later today and report back what we've found.

  7. #5

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Ok, todays update; multi-meter out and tested all fuses and relays, all tested ok. Bank angle sensor ok. As we went along, we cleaned all the connector plugs with contact cleaner while we were in there. There was a couple of dirty ones, but no scorching anywhere, and nothing horrendously corroded/damaged/detached. Also disconnected the ECM connector plugs and cleaned with contact cleaner in there too. Nothing to be seen here, no obvious external signs of damage here.

    While we had the bike apart, air box off, the air filter is brand new. Plugs out checked & cleaned. The plugs are brand new fitted only a couple of months ago. Nothing wrong evident here. Multi-meter on all HT leads and caps for resistance test, all ok, and plug caps all ok.
    Also, all vacuum pipes on the throttle bodies were changed for new vacuum hose. Vacuum hose is cheap as chips, so this change is a peace-of-mind no-brainer while we're in there.

    FI light stays lit, no blinking. High beam light, tail light, and licence plate lights not working. Engine cranks over no problem.

    Fuel pump does not prime. If you power the pump directly it runs no problem, and there is fuel travelling through the fuel rail and back to tank through the fuel return hose. However, no fuel injectors are working, i.e, no fuel being squirted into the throttle bodies, and no spark at the plugs. All injectors tested for Ohms with multi-meter, all ok. All injectors directly powered - all operate ok.

    I'm not that familiar with the Blackbird, (but I'm becoming so rapidly!), but I believe the fuel & ignition are both controlled by the ECM, which would account for this, and I suppose the no-lights issue too.
    So, at the moment I'm certainly suspecting the ECM is the culprit. We'll most likely get it sent off for test/repair this week.

    Unless any of you Bird experts can point out something we are missing here?

    Thanks in advance.
    Last edited by Shed; 07-21-2019 at 3:54 PM.

  8. #6

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Take the front cowling off and inspect the connectors.
    Under there I had a main ground wire (green) melt the connector. Just jumped and hard wired the connection.

    Good Luck! in your BB journey as it will only help you in knowing your machine.

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

  9. #7

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Thanks STex, but also been under there today too, couldn't see anything out of the ordinary, but will take another look specifically.
    Also, you've just reminded me, there are some green wires bolted to the frame just to the left rear fuel tank mounting point, and that was also cleaned up today. It didn't appear to need cleaning, but we did it regardless.

    (PS It isn't my bike, it belongs to my friend. But, as the spanner monkey, I get paid in roast dinners, Jim Beam, or Jack Daniel's for working on it).
    Last edited by Shed; 07-21-2019 at 4:11 PM.
    SouthTexas11XX and deadman like this.

  10. #8

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Does this bike have a HISS immobilizer? Would that disable power to ignition and fuel system same as symptoms you are seeing? Also, only test I know of for ECU is to try it on another blackbird, if you can find one. My money, however, is on some short circuit somewhere.

  11. #9

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    fizzy, looks like a 2002 bike so yes to the HISS. HISS disables the fuel pump but the bike will still turn over. Just wish i could disable mine. Another potential spanner in the works
    carpe diem

  12. #10

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Thanks fizzy, yes it does have HISS. I agree on some short circuit possibility, but at the moment suspect that short circuit could well be in the ECM itself, due to the jumper mishap. The bike fuel pump was priming, bike firing up, and running, all lights working properly before the fuel flow test, then it's gone belly-up since the testing.
    Also, the no lights aspect seems puzzling as I don't think HISS would affect those. Would it?
    As I say I'm no expert on the Bird, but willing to learn about it.

    Unfortunately, we don't know anybody with another Bird to swap the ECM, but I'll make a few calls tomorrow and see if I can scrounge up something.
    Last edited by Shed; 07-21-2019 at 5:16 PM.

  13. #11

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    High beam light, tail light not working


    That is were I would be looking, while working you have knocked something off - disconnected something...…..or similar


    provided you are 100% sure the
    High beam light, tail light, were working prior to this issue then that is were I would be looking, what is common to all this stuff is probably under the fuse holder/relay holder - when a pile of unrelated stuff stops working they must come together somewhere, it is a mystery and I would be starting with the simple one - tail light

    did you ever smell anything burning ?

    PS - the ECU will not stop the tail light working

  14. #12

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    100% sure the lights were working properly just a few days before the fuel flow test, as the bike went in and passed its MOT test. The bike wasn't used between passing the MOT and doing the fuel flow test. The bike worked and ran, but not perfectly due to the fuelling issue, to the MOT garage and back, then it was parked up in the garage at the house. Fuel flow test followed a few days later.

    No burning smell recalled at any time. A mystery, and a pain in the @rse!

  15. #13

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Quote Originally Posted by Shed View Post
    100% sure the lights were working properly just a few days before the fuel flow test, as the bike went in and passed its MOT test. The bike wasn't used between passing the MOT and doing the fuel flow test. The bike worked and ran, but not perfectly due to the fuelling issue, to the MOT garage and back, then it was parked up in the garage at the house. Fuel flow test followed a few days later.

    No burning smell recalled at any time. A mystery, and a pain in the @rse!

    indeed lol

    - going back to what I said above - tail light and hopefully all related...……...they all end up under the fuses at some point, but the loom runs from front to back...…….tail light switch is on the bars and heads to the rear so a clue could also be if the front lights are working, there is a big plug under the tank or in the front end somewhere that might just be partially hanging together - exact location I am not sure - download the manual from this site and you will see a diagram of the loom and all its connections and routings

  16. #14

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    Cheers Geoff, I'll have a look at that, and with the way this is going, along with everything else on this bike too!

  17. #15

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    Re: Fuel Pump Won't Prime & Lights Not Working After Fuel Flow Test

    30A fuse on starter relay?
    The answer is 42


 
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