08 R6 Won’t Stay Running

Discussion in 'Tech' started by RRRepsolRider, Feb 20, 2021.

  1. RRRepsolRider

    RRRepsolRider Well-Known Member

    Bike sat from Halloween til around Xmas. Didn’t start it and it’s been in the garage. No heat in there.

    What I know: Batt is good. FI fuses are good. Fuel pump is kicking on after kill switch is turned on (woodcraft key delete), fuel is flowing out, I’ve pulled the gas tank/pump and both are clean. I’ve pulled the injectors and fuel rail and they’re clean as well. Bike will run shortly if starting fluid is squirted into air intake. Will run roughly, idle then die. If throttle is touched, it usually dies.

    I’m thinking maybe I need to pull the injectors out and let them soak overnight. If that’s possible, what could they soak in?

    Any pointers at this point is helpful. I’m about at whits end
  2. dudutzu

    dudutzu Well-Known Member

    It's lacking fuel. It doesn't take much to clog the injectors(you wouldn't be able to see it by just looking at them).
    Check fuel pressure?
  3. RRRepsolRider

    RRRepsolRider Well-Known Member

    I’m pulling the injectors again and cleaning them a different way. That’s the only thing it can be. Fuel starvation. Damn ethanol
  4. TurboBlew

    TurboBlew Registers Abusers

    the fuel in the injectors is under pressure. Maybe try back purging the regulator.
    If someone stored MR12 in the system then its possible it has some blockage but standard pump fuel?
    I had a bike that sat for 5 years and the fuel pump was frozen. Got a new pump and the thing fired right off.
    The sock filter does pretty good.
    If I had a freshly built motor...I would invest in the $160 to make sure all the injectors are flowing up to spec.
  5. RRRepsolRider

    RRRepsolRider Well-Known Member

    When I pulled the injectors and cleaned them, I opened them with a 9vt batt and they seemed to free of debris. Had good flow coming out of them end. I’ll try back purging the regulator and checking the pump again today. It had some 110 VP in it but I cleaned it out and the pump as well. Only 93 octane since it was cleaned.
  6. TurboBlew

    TurboBlew Registers Abusers

    berrymans b12 is your friend here... does a good job of dissolving.
    RRRepsolRider likes this.
  7. Spitz

    Spitz Well-Known Member

    Doesn't seem plausible but is the gas stale or contaminate?
  8. RRRepsolRider

    RRRepsolRider Well-Known Member

    I doubt it. I’ve put the same gas (from same jug) in different machines and all have ran. Bike runs but idles low and rough then dies so duel is combustible.
  9. RRRepsolRider

    RRRepsolRider Well-Known Member

    I’ll definitely check in with him. Bout to dump the fuel and check the pump then add some fresh fuel.
  10. RRRepsolRider

    RRRepsolRider Well-Known Member

    Tried looking him up but no luck.
  11. CBR723

    CBR723 Well-Known Member

    That's because it's a product not a person.......:beer:
  12. RRRepsolRider

    RRRepsolRider Well-Known Member

    Totally read that as a person ‘dissolving’ issues (face slap)
  13. 05Yamabomber

    05Yamabomber Dammit Haga

    I had a similiar issue recently. Mine ended up needing new orings in the pump. (original problem was inner pump came loose in transit), then when I put it back together I ripped the oring. I would pour race gas into the throttle bodies and it would fire right up.

    Does the fuel pump build pressure or does it just keep priming? You should hear it prime, then slow down as it builds pressure. Thats how I knew to start with the pump.
  14. RRRepsolRider

    RRRepsolRider Well-Known Member

    The pump can be heard priming, then stops but does make a sound. While the injectors are out, I can see it squirt fuel through them so I’m guessing there’s enough pressure.
  15. stangmx13

    stangmx13 Well-Known Member

    But is it a 47psi squirt? The fuel pressure is probably worth testing.
  16. RRRepsolRider

    RRRepsolRider Well-Known Member

    Don’t have a tester so I don’t know psi. Seems high but ... Probably swap pumps to be safe. If the issue still remains I have an extra pump. No biggie there.

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