Dead #3 Cylinder on ‘98
Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the CBRXX.com.

Register ButtonIf this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Results 1 to 13 of 13
Like Tree1Likes
  • 1 Post By stone

Thread: Dead #3 Cylinder on ‘98

  1. #1

    Member #
    38097
    Join Date
    Jul 27 2019
    Location
    Sonoran Desert
    Posts
    6
    Liked
    1 times

    Dead #3 Cylinder on ‘98

    So let me tell you a story.....

    I pushed home a dead ‘98 my neighbor gave me. Less than 13,000 miles. It hasn’t run in maybe 2 years. I’ll try to keep this short.

    Original owner is now 80. I actually shared an office with him when we both worked and can remember when he bought it new.

    A few years ago he decided to sell it and took it to a Honda dealer to “tune up” or do something to something in preparation for sale. He had quit riding by this time and would only start the bike and let it run to keep it in good shape. He stored his bike in his entryway. He started the bike and let it idle and walked away, he completely forgot about. When he found it it was dead. Rolled it in his garage and covered it up.

    I got it home. Dead battery replaced with new battery. Checked oil. Looked good. Checked coolant. Had to add about 1 quart. Gas tank completely dry. Added fuel. Fuel leaked out everywhere. Shoved drain pan under bike. Lifted rear of tank and learned about the shutoff valve. Vacuum petcock leaked and fuel was coming out the carb overflows.

    Ordered rebuild kit for petcock and completed that. While I was waiting for parts I rigged up a fuel supply and tried to start the bike. I pinched shut the vacuum line to the fuel petcock. Bike wouldn’t start but would fire. Overflows in carbs quit leaking gas.

    Procured starting fluid and removed air-box cover. Gave each carb intake a squirt and bike started. Ran very poorly.

    After the bike warmed a bit I could keep it running at about 3-4000 rpm. Even lower but obvious miss and wouldn’t idle. I independently squirted starter fluid into each carb inlet. I got an obvious and strong response in revs except cylinder #3. #3 was dead. No response for #3.

    After running the bike a took exhaust header temps using a laser temp gun. #3 was twice as hot as the other 3 cylinders. About 350 ish vs 175 ish F.

    Pulled plug #3. Looked good. Hooked up to coil could see spark.

    Out with all the plugs and completed compression test..... all 4 cylinders even at about 135. Throttle wide open and holding the vacuum slides open with a finger.

    Put new plugs in. Put bike back together with fuel tank on properly.... same thing. Bike runs crappy. Misses. Exhaust header 3 temperature way hotter and out of family with other temps.

    The bike fires for plug #2 and #3 at the same time. I believe the spark I was seeing was for the number 2 power stroke and not the #3 power stroke. I believe the spark occurring for #3 is at the exhaust stroke and is burning the fuel in the exhaust system explaining the high header temperature.

    Soooo.... my question is what initiates and controls the ignition spark for cylinder #3 power stroke? I’m suspecting a crankcase or camshaft position sensor, both or ignition timing module or something.

    I don’t have a manual yet and am not sure if this bike has these sensors and where they are.

    Any my thoughts on my next move?

  2. # ADS
    Sponsor
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many

    CBRXX.com is the original Honda CBR1100XX Super Blackbird community! Registered Users do not see these ads. Please Register - It's Free!


  3. #2

    Member #
    1728
    Bike(s)
    81,82,83 CBF's, 98 CBRxx, 07 CBR-1000RR/R, 83 FXSB
    Join Date
    Jun 03 2007
    Location
    Canada
    Posts
    3,963
    Liked
    1041 times

    Re: Dead #3 Cylinder on ‘98

    You can see that there are only two coils. Each coil services two cylinders. The Honda's have long used a "lost spark" system (I think that's what they call it?) where by, one cylinder is under the power stroke..and the companion cylinder is under it's exhaust stroke, but it's spark plug is fired anyway. They are not a "single fire" system. At a guess it will be wise to ensure that the spark plug wires and running to the correct coils so that there is a the correct firing order in place. The coil pairings are #1/#4 and #2/#3. The spark plug wires are not all the same length, as I recall, so mixing them up might be somewhat difficult, but it's still worth looking at.

    The high cylinder temp for #3 is interesting. I've never measured pipe temps, but have done the "touchy feely" pipe test to check for hot or cold pipes to see what is firing and what is not. If you've got fire in the hole with a high temp I'd normally say it's a possible lean condition. Interesting issue. Sorry I can't be of more help.

    T.
    Last edited by TigreST; 07-27-2019 at 10:38 PM.
    "Stemmata quid faciunt."

  4. #3

    Member #
    20435
    Bike(s)
    99 BB 85 VF1100c
    Join Date
    Jul 18 2015
    Location
    Rochester, NY USA
    Posts
    303
    Liked
    73 times

    Re: Dead #3 Cylinder on ‘98

    #3 may be running too lean. Carb jets probably need cleaning after sitting for so long.

  5. Remove Advertisements
    CBRXX.com
    Advertisements
     

  6. #4

    Member #
    208
    Bike(s)
    '99 XX, '01 GL1800, '99 Hellcats, '74 FLH, '83 XL
    Join Date
    Nov 04 2006
    Location
    Shreveport, LA
    Posts
    305
    Liked
    9 times

    Re: Dead #3 Cylinder on ‘98

    Quote Originally Posted by exxelent View Post
    #3 may be running too lean. Carb jets probably need cleaning after sitting for so long.
    +1 Sounds more like a blocked/restricted idle passage in #3 carb, and possibly an air leak - maybe a compromised intake seal? That combination can drive you to frustration looking for a single source. Rebuilding the 21yo carbs w/new gaskets/seals may be worth consideration.

  7. #5

    Member #
    540
    Bike(s)
    97 BB Turbo
    Join Date
    Dec 10 2006
    Location
    Augusta NJ
    Posts
    1,563
    Liked
    153 times

    Re: Dead #3 Cylinder on ‘98

    Clean idle circuit, pilot circuit and jets, and both air corrector circuits accessible from the bell mouth.
    I'd guess clogged pilot jets are the main problem.

  8. #6

    Member #
    37115
    Bike(s)
    1997 honda cbr 1100xx ,2000 zx12r ,1997 xr400,
    Join Date
    Feb 15 2019
    Location
    joshua tree ,calif
    Posts
    23
    Liked
    8 times

    Re: Dead #3 Cylinder on ‘98

    what hanksxxx and all above said +1
    might have to replace the carb insulators"intake boots" aswell mine wer rock hard on my 97 carbi after 69k and many heat cycles.
    its a funny thing my carbi bird starts like a FI bike never needs choke either for the most part , take your time and get the carbs and intake system sorted first then move on
    dont for get the O rings in the fuel intake lines there 4 two on each fuel tee , dont ask me how i know , partzilla has all the parts

    https://www.partzilla.com/catalog/ho...7/cbr1100xx-ac
    johnnyquick likes this.

  9. #7

    Member #
    38097
    Join Date
    Jul 27 2019
    Location
    Sonoran Desert
    Posts
    6
    Liked
    1 times

    Re: Dead #3 Cylinder on ‘98

    I’m proceeding to pull the carbs to clean them up. I’ll keep you posted as things progress at a relaxed slow pace. ...

  10. #8

    Member #
    38097
    Join Date
    Jul 27 2019
    Location
    Sonoran Desert
    Posts
    6
    Liked
    1 times

    Re: Dead #3 Cylinder on ‘98

    Carbs are quite the mess inside. Lots of jets clogged. One float valve was stuck. I’m surprised it ran at all. I really am.

    Now waiting on some parts.
    Attached Images Attached Images

  11. #9

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
    Location
    Arizona
    Posts
    6,951
    Liked
    1787 times

    Re: Dead #3 Cylinder on ‘98

    Check crankcase chances are it's full of fuel because of the carbs hanging open. If it smells of gas dump it and the filter change them both.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  12. #10

    Member #
    38097
    Join Date
    Jul 27 2019
    Location
    Sonoran Desert
    Posts
    6
    Liked
    1 times

    Re: Dead #3 Cylinder on ‘98

    Quote Originally Posted by beestoys View Post
    Check crankcase chances are it's full of fuel because of the carbs hanging open. If it smells of gas dump it and the filter change them both.
    Your exactly correct.... I found that out a few days ago. New oil and filter is already installed. I’ll change it again as soon as I get it running a bit.

  13. #11

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
    Location
    Arizona
    Posts
    6,951
    Liked
    1787 times

    Re: Dead #3 Cylinder on ‘98

    Glad you caught it early. There's been a couple birds that have dies from this affliction. The FI are just as susceptible, the FPR fails and does the same thing. Keep and eye on that weep hole. The ethanol we have to run these days is not nice to rubber parts out here in the desert. You should be good for a long while if you ride regularly. But if you park it for long periods be mindful of the effects.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  14. #12

    Member #
    38097
    Join Date
    Jul 27 2019
    Location
    Sonoran Desert
    Posts
    6
    Liked
    1 times

    Re: Dead #3 Cylinder on ‘98

    Well.

    Carb kits were slow getting here and they didn’t make it before I went on vacation up in the cool country.

    Today I finished the carbs and put the bike back together. I pulled a vacuum on the petcock to fill the carb bowls before hooking up the vacuum line.

    The bike fired right up and runs perfect.

    I just completed a test ride and all is well.

    Winner winner pizza dinner.

    Thanks to all all for your thoughts and advice.


  15. #13

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
    Location
    Arizona
    Posts
    6,951
    Liked
    1787 times

    Re: Dead #3 Cylinder on ‘98

    Your very welcome glad to see another BB back on it's flying wings. Now be sure to always gear up and definately wear a face shield otherwise you'll be picking bugs out of that ear to ear grin shes going to be giving you.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.


 

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •