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Thread: Help with Backfiring

  1. #1
    Registered User
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    May 2018
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    Thousand Oaks, Ca.
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    Help with Backfiring

    Need some input on my "new" 2001 r1100rt.

    Just picked a 35,000 mile bike that's been sitting in a garage for 8 years in a garage and looks quite good. Drained the old gas, put in fresh with some added Seafoam and then ran the old gas out of the tank lines by keying on and off, and the flow was strong and some darker fuel came out but did this until it flowed cwith new clear fuel. Then did the same through the lines that go to the injectors.

    Changed the spark plugs to Autolites.

    It fires, but it struggles to idle, it will rev but not easily and with a delay, and then inevitably pops itself dead. I push the starter, same thing, fires, idles rough, backfires (pops) and dies.

    I am assuming dirty injectors? Am I overlooking something else?
    Thanks!

  2. #2
    Quote Originally Posted by mykrs View Post
    Need some input on my "new" 2001 r1100rt.

    Just picked a 35,000 mile bike that's been sitting in a garage for 8 years in a garage and looks quite good. Drained the old gas, put in fresh with some added Seafoam and then ran the old gas out of the tank lines by keying on and off, and the flow was strong and some darker fuel came out but did this until it flowed cwith new clear fuel. Then did the same through the lines that go to the injectors.

    Changed the spark plugs to Autolites.

    It fires, but it struggles to idle, it will rev but not easily and with a delay, and then inevitably pops itself dead. I push the starter, same thing, fires, idles rough, backfires (pops) and dies.

    I am assuming dirty injectors? Am I overlooking something else?
    Thanks!
    I agree dirty injectors.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  3. #3
    Registered User m_stock10506's Avatar
    Join Date
    Feb 2005
    Location
    Trinity, NC
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    1,029
    Sitting for 8 years!! I'm amazed that you were able to get any fuel through the injectors at all.

    Seriously, pull the fuel injectors. There are plenty of DIY videos on cleaning injectors at home. I would send them to a professional injector cleaning service. They will change screens, and o-rings. They will measure flow rate before and after cleaning and provide a report. You should get back injectors that flow gas very equally with good spray pattern. If you're lucky enough to have a service nearby, just bring them in. I sent mine out to Injector Rx many years ago. Well worth it. Should cost you about $50 with shipping.

    The 1100 RT will give you a soft pop if you chop the throttle and have engine braking. This is pretty normal. You can avoid a lot of that if you just keep the throttle slightly open instead of fully shut.
    Michael Stock, Trinity, NC
    R1100RT, R100, R60/6

  4. #4
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    Thank you!
    I'm pulling them and shipping them out today to a fella in Ohio, he says with any luck I'll have them back for the weekend.
    I will update after they return.

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