1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Pop from airbox

Discussion in 'XJ Technical Chat' started by buzz81mach, Aug 19, 2012.

  1. buzz81mach

    buzz81mach Member

    Messages:
    109
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Crawfordsville, IN
    What could it mean if I get a popping sound and a big puff of air back into the airbox from the carbs?
     
    buzz81mach, Aug 19, 2012
    #1
  2. mlew

    mlew Well-Known Member

    Messages:
    3,090
    Likes Received:
    241
    Trophy Points:
    63
    Location:
    Apex, NC
    Two things;
    Carbs need servicing and most imporntant your valves need to be adjusted.
     
    mlew, Aug 19, 2012
    #2
  3. Rickinduncan

    Rickinduncan Member

    Messages:
    215
    Likes Received:
    1
    Trophy Points:
    18
    Location:
    Duncan, BC Canada
    98% of all the posts on XJ Chat deal with either carbs or valves. Just once, I'd like to see one of the wizards post ' It's nothing - just run some seafoam through it and it will be like new again', but I don't think that's going to happen! ( place little smiley faced thing here)
     
    Rickinduncan, Aug 19, 2012
    #3
  4. buzz81mach

    buzz81mach Member

    Messages:
    109
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Crawfordsville, IN
    Carbs are church of clean and valves in spec as of 10 days ago.
     
    buzz81mach, Aug 19, 2012
    #4
  5. mlew

    mlew Well-Known Member

    Messages:
    3,090
    Likes Received:
    241
    Trophy Points:
    63
    Location:
    Apex, NC
    You should have mentioned that in the first post.
    Re check your carb sync and idle mixture. I suspect it idles well then pops back when you give it throttle. That would indicate one or more cylinders are lean at idle.

    SeaFoam and other gas additives are good preventive use items but will not fix problems most of the time.
     
    mlew, Aug 19, 2012
    #5
  6. buzz81mach

    buzz81mach Member

    Messages:
    109
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Crawfordsville, IN
    Hey now, don't have a cow. Sorry for not putting it in the first post. I was using my phone to post and I did not have much time, so I just typed a few things and hit post. Unfortunately, I am waiting on some funds so that I can finally get my colortune plug. That would make sense since it runs fine (and rich) with the enrichment circuit on. I would richen it myself, but I have no clue which one is lean.
     
    buzz81mach, Aug 19, 2012
    #6
  7. maverickbr77

    maverickbr77 Member

    Messages:
    859
    Likes Received:
    1
    Trophy Points:
    16
    Location:
    Lowville, New York
    take a look at your plugs
    white = lean
    black = rich
    light brown = good
     
    maverickbr77, Aug 19, 2012
    #7

Share This Page