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.

#2 cylinder not firing

Discussion in 'XJ Technical Chat' started by joejr2, Dec 10, 2014.

  1. joejr2

    joejr2 Active Member Premium Member

    Messages:
    713
    Likes Received:
    109
    Trophy Points:
    43
    Location:
    Santa Fe,NM
    I've been working on an 82 xj650seca for a couple of months. I just set the
    valves to spec with thinner shims. I pulled the carbs two weeks ago and blew
    out the passages with carb spray and compressed air,replaced float valves
    and seats,soaked all the jets and needle valve seats in carb cleaner,checked
    the slides and diaphragms,they were working like they should,and bench synchronized the throttle plates. then reinstalled the carbs.
    when I started it,it ran strong in cylinders #1#3and#4 but the header stayed cold on #2. It has a new battery with a 2 amp float charger on it
    and the plug tested with a strong spark. I pulled the tank and took the top off #2 carb to look at the diaphragm and slide and they were still ok.
    What should I look for next ? Any ideas ?
     
    joejr2, Dec 10, 2014
    #1
  2. Bigshankhank

    Bigshankhank Active Member

    Messages:
    908
    Likes Received:
    125
    Trophy Points:
    43
    Location:
    Bastrop, TX
    Compression. Check all four cylinders while you are doing it. All four should be within a few psi of each other.
     
    Bigshankhank, Dec 10, 2014
    #2
  3. BruceB

    BruceB Active Member

    Messages:
    510
    Likes Received:
    24
    Trophy Points:
    28
    Location:
    Isle of 8 Flags, Florida
    Check the enrichment plunger and seat. If it is dirty and stuck it will cause a very rich situation and the cylinder won't run.
     
    BruceB, Dec 10, 2014
    #3
  4. FtUp

    FtUp Well-Known Member

    Messages:
    1,309
    Likes Received:
    94
    Trophy Points:
    48
    Location:
    pacific northwest
    FtUp, Dec 10, 2014
    #4
  5. Polock

    Polock Well-Known Member

    Messages:
    9,751
    Likes Received:
    2,097
    Trophy Points:
    113
    Location:
    Beaver Falls, PA
    Swap the plugs around, sometimes the spark can "blow out" under compression
     
    Polock, Dec 10, 2014
    #5

Share This Page