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no fire in 2&3

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  • #1

    no fire in 2&3

    i lost cyl 2&3 on my ride home friday.one minute they worked next they didn't.

    i put in new black mikexs coils last season (2000 km ago) and did the broken wire fix.
    right now i'm checking for more broken wires but they seem ok so far. (i'll keep looking)
    in the mean time, what other diagnostics can i do to trace this problem?

    when i swap the plug wires (1 to 2 and 3 to 4) and switch the orange and grey wire on the TCI 2&3 fire but not 1&4.

    seems to defiantly be an electrical problem of some kind, as i say i'll keep checking for broken wires as this is the most obvious problem but other suggestions are appreciated!
    1979 XS1100SF 37000km
    Green Dyna Coils
    Stainless Brake Lines

    1973 CB100
    kevXS
    Tags: None
  • #2
    Test the coils. That sounds like about the average number of km's that those coils last before they fail.
    Nathan
    KD9ARL

    μολὼν λαβέ

    1978 XS1100E
    K&N Filter
    #45 pilot Jet, #137.5 Main Jet
    OEM Exhaust
    ATK Fork Brace
    LED Dash lights
    Ammeter, Oil Pressure, Oil Temp, and Volt Meters
    Green Monster Coils
    SS Brake Lines
    Vision 550 Auto Tensioner

    In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

    Theodore Roosevelt

    Comment

    • #3
      1 & 3 are on the same coil and 2 & 4 are on the other. It's probably a plug wire or boot problem.

      Unscrew the boots an trim about 1/4" off each wire and re install the boots and see if that helps.
      Greg

      Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

      ― Albert Einstein

      80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

      The list changes.

      Comment

      • #4
        i forgot about the coils, i was thinking 1&4 and 2&3 were on the same coil. so it seems my coils are working but only on 1 cyl each. strange. the wires and boots are quite new but i'll trim some and try anyway.

        funny how this happened without warning, there were no intermittent problems before this happened it just quit about 1 min after leaving work and i drove home on 2 cylinders
        1979 XS1100SF 37000km
        Green Dyna Coils
        Stainless Brake Lines

        1973 CB100
        kevXS

        Comment

        • #5
          If you have replaced the wires on stock coils, you might want to check your work at the coils too. You may have lost connection, or gotten some moisture in there.
          Greg

          Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

          ― Albert Einstein

          80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

          The list changes.

          Comment

          • #6
            Originally posted by BA80 View Post
            1 & 3 are on the same coil and 2 & 4 are on the other.
            Wrong.

            1 and 4 are on the same coil and 2 and 3 on the other

            You have one ignition coil or pickup/wire etc that's not working. If you just switch the orange and grey LT wires and leave all the HT caps unswitched, the lack of spark will go to 1 & 4. Betcha
            Last edited by James England; 06-12-2011, 12:55 PM.
            XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

            Comment

            • #7
              James is right. Sorry

              That means it could be, and probably is, the pickup coils.
              Greg

              Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

              ― Albert Einstein

              80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

              The list changes.

              Comment

              • #8
                Originally posted by kevxs View Post
                ...funny how this happened without warning, there were no intermittent problems before this happened it just quit about 1 min after leaving work and i drove home on 2 cylinders

                Close to the same issue I had when my MikesXS black coils failed.
                Four wheels move your body, two wheels move your soul.

                ATGATT, It could save your life!

                1980 XS 1100SG
                Dyna 3 Ohm Hi Output Coils
                Pod Filters
                DynoJet Kit
                T.C.'s Fuse Block
                Slip Streamer Turbo Windshield
                Custom Tank and Side Cover Decals
                V-Max Auto CCT

                Comment

                • #9
                  Originally posted by BA80 View Post
                  James is right. Sorry

                  That means it could be, and probably is, the pickup coils.
                  Silly greg! I am still guessing it is the mikes xs black coil plague...
                  Nathan
                  KD9ARL

                  μολὼν λαβέ

                  1978 XS1100E
                  K&N Filter
                  #45 pilot Jet, #137.5 Main Jet
                  OEM Exhaust
                  ATK Fork Brace
                  LED Dash lights
                  Ammeter, Oil Pressure, Oil Temp, and Volt Meters
                  Green Monster Coils
                  SS Brake Lines
                  Vision 550 Auto Tensioner

                  In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                  Theodore Roosevelt

                  Comment

                  • #10
                    multimeter testing

                    i think my coils are good . . .

                    i have 15k ohm resistance between my 1&4 plug wires and the same reading for 2&3

                    i think i have about 1.5k ohm resistance between by yellow (with stripe) wires on the TCI and the same reading for the white (with stripe) wires on the TCI.

                    am i correct that it is likely a broken pickup wire?
                    1979 XS1100SF 37000km
                    Green Dyna Coils
                    Stainless Brake Lines

                    1973 CB100
                    kevXS

                    Comment

                    • #11
                      Take off the left engine cover and check the pickup coils. The plug for them is behind the fuse panel.

                      There is a thread on testing and repairing them here....

                      http://www.xs11.com/forum/showthread.php?t=543

                      http://www.xs11.com/forum/showthread.php?t=121
                      Last edited by BA80; 06-12-2011, 01:12 PM.
                      Greg

                      Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                      ― Albert Einstein

                      80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                      The list changes.

                      Comment

                      • #12
                        It's easy to establish if it's one of the coils and I wouldn't trust the multimeter thing too much at this stage.

                        Just switch the orange and grey wires. If the no-spark stays on the same two plugs, it's the coil/leads/HTcaps. If the no-spark moves to the other plugs it's NOT the coil.

                        When you did the switching, you switched HT caps too and that doesn't really help you along in the diagnosis. Lots of people havereported how rubbish the MIkesXS coils are

                        So... switch the orange and grey and get back with your report!
                        Last edited by James England; 06-12-2011, 01:15 PM.
                        XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

                        Comment

                        • #13
                          Good point James.
                          Greg

                          Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                          ― Albert Einstein

                          80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                          The list changes.

                          Comment

                          • #14
                            It's good if you have sparks at one set of plugs. You can just switch one thing at a time and see if the fault moves. The problem with the multimeter tests is that I've found the results don't necessarily indicate the truth. Switching a known working component which is already on the bike (instead of having to buy it) is the way to go with the ignition. If the no-spark moves after the orange/grey switch, that means it's not the coil but somewhere in the pickup circuit. The orange and grey should then be switched back to their correct positions and you can then do a switch of the pickups. Same thing... if the fault doesn't move after switching, it's not the pickup etc.
                            XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

                            Comment

                            • #15
                              so when i switch the orange and grey wires, i still dont get fire in 2 & 3. i guess this means my coil is bad?
                              1979 XS1100SF 37000km
                              Green Dyna Coils
                              Stainless Brake Lines

                              1973 CB100
                              kevXS

                              Comment

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