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Inside two cylinders not firing?

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  • #16
    Hey TC

    If all else fails, swap the primary wires and the plug caps to the other set of plugs. 1-2 & 2-4 make sure you mark where everything is originally. If the problem goes to the outside cylinders, its the Coil.

    Floyd
    '80g

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    • #17
      Another trick is to swap the orange and the gray wires to the coils at their connection. Example, plug the orange wire from the coil into the gray wire that feeds the other coil, and vice versa. Then swap the plug wires to the corresponding cylinders. If the problem swaps to the other coil, then the coil is your problem.
      I think that's waht Floyd just said, only I used different words.

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      • #18
        ok, I checked over the wiring and whatnot...plugged/replugged various things making sure to put everything back as I found it. Overnight I charged the battery, so now I go out and put the battery in and give it a shot... no fire at all.

        Where yesterday the outer two cylinders fired, now nothing is... not even a hint of it. Whatever I did I seem to have made it about 100% worse.
        Rebuilt 1981 XS1100 H
        My story

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        • #19
          More checking.

          Fuses are all ok, yet when I pulled a spark plug out, grounded it against the engine and turned it over I got nothing. No spark. Nothing.

          Initial attempt, cylinders 1 and 4 got spark... 2 and 3 did not. After some low grade poking around, verifying fuses etc and an overnight battery charge... now no cylinders are getting spark.

          I am a death sentence to all things mechanical.
          Rebuilt 1981 XS1100 H
          My story

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          • #20
            Hey Again,

            Okay, back to basics. While you were working on the battery, the plugs for the TCI are close in that area, especially if you took off the seat! Pull the plugs from the TCI, there is a large one, and a smaller one. Check the contacts, clean, and then replug them back in.

            You SAY the fuses are OK? Do you have glass fuses? If so, they can LOOK okay, but still be bad. You will want to pull them and put an ohmmeter on them to check for continuity=O/zero resistance is good, OPEN, no reading could indicate a short/break! Check both ends of where the fuse plugs into. Use the VOLTMETER setting, and check to see that you have power coming to ONE end of the pair of fuse clamps!

            Once you have determined that you are getting POWER to the fuse clips, and the fuses are intact, then you can move on to checking the wires AT the spark plug coil terminals to verify power is getting to the coils!

            BTW, when testing the coil plug wires for spark, you need to have at least one end attached to a plug screwed into the engine. The spark travels from 1 plug wire, thru plug, thru engine, then back up thru the other matching plug, wire and back into the COIL! IF the other plug wire isn't connected somehow, then the spark has NO route to follow!

            IF all else fails, or is too overwhelming for you, like has been stated, give Bruce Doucette a CALL!
            T.C.
            T. C. Gresham
            81SH "Godzilla" . . .1179cc super-rat.
            79SF "The Teacher" . . .basket case!
            History shows again and again,
            How nature points out the folly of men!

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            • #21
              Definitely a bit overwhelming but I'll look into the fuses and all that again tomorrow. I tested each with a voltmeter and got a tone for a complete circuit but I'll check again.

              Does Bruce Doucette have an email address? I'd feel weird calling the guy out of the blue, but I think it might come to that.
              Rebuilt 1981 XS1100 H
              My story

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              • #22
                Hey Datter,

                Follow this thread to the Member's Lounge , Look up Username: Desert1 and then click on Profile, and then you can click on link to SEND him an Email, or a PM, to introduce yourself before ringing him up!

                T.C.
                T. C. Gresham
                81SH "Godzilla" . . .1179cc super-rat.
                79SF "The Teacher" . . .basket case!
                History shows again and again,
                How nature points out the folly of men!

                Comment


                • #23
                  Thanks, I pm'd him and may well need to pick his brain if he's up for it.

                  I spent the evening going over all the connectors and what not, cleaning them and making sure all was well.. which it seems to be. There is just no spark getting to any of the plugs at all.

                  Still tryin'
                  Rebuilt 1981 XS1100 H
                  My story

                  Comment

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