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Cant tune carb. after backfire

Discussion in 'Motorcycle Tech Talk' started by eddie88, Aug 22, 2011.

  1. eddie88

    eddie88 New Member

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    My 2001 fat boy backfired through the carb. when i went to restart it after it it had had been shut off about 15 min. It blew the carb. to intake seal off.Went got new seal and breather element.Installed those.Fired up ran bad found intake seal leaking replaced seals. Still no better.Tore carb down checked float hight it was good. Removed jets idle air screw blew it out good.Still ran bad. Installed new o-rings and jets.still running bad!Any ideas?:banghead:
  2. hotroadking

    hotroadking Super Moderator Staff Member

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    backfires through carb can be ignition related, timing off,
    could be bad ignition module, plug wire bad, plug bad,

    You need to find the source of the backfire
  3. eddie88

    eddie88 New Member

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    Any way to test ignition mod.without going to h d dealer?
  4. hotroadking

    hotroadking Super Moderator Staff Member

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    Well you could check the plugs and see if it's firing
    it could be a coil, could be a plug, could be a wire, could be a sensor

    Do you have any trouble codes?
    Do you have a Service Manual for the bike?
  5. eddie88

    eddie88 New Member

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    Yes but it does not show me any codes that i can find.Its a H D manual.
  6. cowboy

    cowboy Moderator Staff Member

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    What if anything have you done with the Cam chain tenetioner ?
  7. eddie88

    eddie88 New Member

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    nothing yet should i ?
  8. eddie88

    eddie88 New Member

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    Whats it mean when my DTCs just flashes 10 times over and over?
    Last edited: Aug 23, 2011
  9. hotroadking

    hotroadking Super Moderator Staff Member

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    you're getting a code set the manual shows you how to
    pull the codes without a scanner for your model year bike.

    I'd have to check at home but I had a 00 Heritage Carb so if you are carb
    it should be the same.

    Under the seat you will find a connector with nothing plugged in, it has four pins
    You have to jumper two of the 4, when I get home I'll find out which two you jump
    then turn on ignition.

    When you do this the Engine Light will flash the code.

    two flashes then three flashes, pause, next code or same code over and over

    this would be a 23 Code for example
    then in the manual the codes are listed in the back.
  10. eddie88

    eddie88 New Member

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    I got the codes. ten flashes over and over is no codes stored.I tested MAP sensor,it is good.So no codes i would think crank and bank sensors are good also.ECM must be good too.wouldnt you think? Where am i back at carburetor?
  11. cowboy

    cowboy Moderator Staff Member

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    How many miles Are on your 01 ? They say Check the cam chain tenentionser at 20 k , they could be worn down or coming apart , it depends on your own set , I've seen them last to 60 k , but seen then go at 2-3 k your at 10 yrs on yours
  12. baggerpaul

    baggerpaul Well-Known Member

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    if it has spark fuel and compression it has to run . check spark . check compresion if valve timing is off compresion will be low or very high . valve timing and spark timing are to diffrent things . if it poped back threw the carb. that bad .check the slide . it might have blown it out . and you might have the needle jet holder upside down wont run good like that. if you had the carb all apart chances are you put it in upside down lots of people do that. and then it runs like crap!
  13. eddie88

    eddie88 New Member

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    I have rechecked all the parts in carb.All in correctly.Might have found something.I tore it down once more blew through all ports a small chunk of rubber came out of the port between vacume port to petcock and enricher port.it was restricted.Ill go back together with it in morn. when i get off work see what it will do.THANK YOU ALL!
  14. eddie88

    eddie88 New Member

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    Got it back togeter.Runs to rich black smokes.Pull enricher out just ah little clears up runs good.what tha hek?
  15. baggerpaul

    baggerpaul Well-Known Member

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    :wtf:i dont know what you did to that carb its just a cv . start al;l over man put it on the bench take it all back apart with the service manual next to you and put it together one piece at a time . you got some thing in wrong ! when you blew the thing apart you prob blew the sealing ring out of the inrich port
  16. eddie88

    eddie88 New Member

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    Sure wish the service manual showed or mintioned a sealing ring in the inritch port!The inritch plunger has a seal in it if thats what you are talking about.All parts are where thay go and installed how thay go.You are wright its just a CV. Thats what makes this so agravating.
  17. baggerpaul

    baggerpaul Well-Known Member

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    ok if you look in the service manual # 28 needle jet if that is installed in the proper way if you open the butterfly you can see it stick out in the bore of the carb. i have seen these put in up side down . make sure the sealing cap of the enrichener is all the way in . and the # 11 and #12 are in the right way or it wont seal and it runs fat. may be when you pull the cable out it brings up the idle and its allowing more air in . and it over comes the rich condition. hope this helps
  18. eddie88

    eddie88 New Member

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    I will look it over good once more.when i look in the port the inricher valve goes in there are no visable seals.Only seal i see is in the end of the inricher plunger.sound wright to you?Thanx for the help.
  19. Lucifer

    Lucifer Well-Known Member

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    You have black rich smoke and when you pull the enrichener out giving it more fuel it clears it up??:confused::confused:
  20. Lucifer

    Lucifer Well-Known Member

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    If the o ring on the end of the cable is concave it could cause a rich condition...that's about the only explanation that makes sense...could be a couple of pieces still lodged in a fuel and air passage...

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