Looking for a miracle...

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  • Gumbo76
    #1

    Looking for a miracle...

    I don't know how much luck I'll have, but I am desperately looking for a Free/REALLY cheap Coil Pack. I was riding my '79 550 back to work at lunch today and lost one cylinder. I get spark intermittently (sp?). I am guessing it is the coil Pack. I really have not had time to dig too deep as I am still at work and will probably be walking my a$$ home tonight. But as soon as I get it back to home base, I will try to dig deeper.

    Right now it is running on three cylinders. The #3 (from left to right) is the one acting up. While it is idling, I pull the spark plug wire out and hold it and occaisionally I get a spark. Can't imagine it is the Plug Wire. And it is most likely NOT the Spark Plug itself. I hope to know more tonight.

    I am so tempted to just give it up... Ugh .

    So if anyone has or knows someone who has a spare kicking around and is willing to help me out, I would greatly appreciate it. If you might have an idea that it may be something else, feel free to chime in. Thanks in advance.
    Tags: None
    • Dogma
      Forum Guru
      • Sep 2007
      • 7142
      • Mason, OH (SW)
      #2
      Well, there are only two coils. The coils fire in pairs, even though the cylinders don't. The plug caps are known to fail as they get old. NGK replacements from Z1 Enterprises are only a few bucks each. Unscrew the old caps and trim back the wire about 6 mm or until you get clean metal before screwing the new cap on.

      For today's emergency, examine the cap on the non-sparking cylinder ans see if it looks cracked or otherwise defective. Unscrew it from the wire, and maybe trim some wire to make sure you have a good connection to the cap. If the cap itself looks to have failed, improvise as required.
      Dogma
      --
      O LORD, be gracious to me; heal me, for I have sinned against you! - David

      Skeptical scrutiny is the means, in both science and religion, by which deep insights can be winnowed from deep nonsense. - Carl Sagan
      --
       '80 GS850 GLT
      '80 GS1000 GT
      '01 ZRX1200R

      How to get a "What's New" feed without the Vortex, and without permanently quitting the Vortex

        Comment

        • rustybronco
          Forum LongTimer
          Bard Award Winner
          GSResource Superstar
          Past Site Supporter
          • Jul 2005
          • 14961
          • Marysville, Michigan
          #3
          Break out a vom and measure the resistance of the plug cap.
          coil testing - The GSResources Forums
          http://www.thegsresources.com/_forum/showthread.php?t=145590
          This forum contains old posts which may have information which may be useful. It is a closed forum in that you can not post here any longer. Please post your questions in the other technical forums.
          De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

          http://www.thegsresources.com/_forum...35#post1625535

            Comment

            • jpaul
              Forum Sage
              Charter Member
              • May 2002
              • 2522
              • Cleveland OH
              #4
              Originally posted by Gumbo76
              I don't know how much luck I'll have, but I am desperately looking for a Free/REALLY cheap Coil Pack. I was riding my '79 550 back to work at lunch today and lost one cylinder. I get spark intermittently (sp?). I am guessing it is the coil Pack. I really have not had time to dig too deep as I am still at work and will probably be walking my a$$ home tonight. But as soon as I get it back to home base, I will try to dig deeper.

              Right now it is running on three cylinders. The #3 (from left to right) is the one acting up. While it is idling, I pull the spark plug wire out and hold it and occaisionally I get a spark. Can't imagine it is the Plug Wire. And it is most likely NOT the Spark Plug itself. I hope to know more tonight.

              I am so tempted to just give it up... Ugh .

              So if anyone has or knows someone who has a spare kicking around and is willing to help me out, I would greatly appreciate it. If you might have an idea that it may be something else, feel free to chime in. Thanks in advance.
              The GSResources Forums
              http://www.thegsresources.com/_forum/showthread.php?t=145973
              JP
              1982 GS1100EZ (awaiting resurrection)
              1992 Concours
              2001 GS500 (Dad's old bike)
              2007 FJR

                Comment

                • Gumbo76
                  #5
                  JPaul,
                  thanks for posting the link to my "FREE PARTS" thread . Perhaps I have something to Barter with... It took me some time to figure out why you posted my Link. LOL!

                  -Gumbo
                  Last edited by Guest; 07-22-2009, 03:13 PM. Reason: Couldn't delete... :-)

                    Comment

                    • jpaul
                      Forum Sage
                      Charter Member
                      • May 2002
                      • 2522
                      • Cleveland OH
                      #6
                      Originally posted by Gumbo76
                      JPaul,
                      thanks for posting the link to my "FREE PARTS" thread . Perhaps I have something to Barter with... It took me some time to figure out why you posted my Link. LOL!

                      -Gumbo
                      DOH. That's what happens when I'm scanning threads quickly in between doing paperwork that's trying to put me to sleep at work.

                      As the saying went on Saturday Night Live, Nevermind.
                      JP
                      1982 GS1100EZ (awaiting resurrection)
                      1992 Concours
                      2001 GS500 (Dad's old bike)
                      2007 FJR

                        Comment

                        • Nessism
                          Forum LongTimer
                          GSResource Superstar
                          Past Site Supporter
                          Super Site Supporter
                          • Mar 2006
                          • 35768
                          • Torrance, CA
                          #7
                          If only one plug is not firing it's not the coil as the others have mentioned. Also, voltage to the coils is a problem on bikes with corrosion in the wiring harness. Basscliff's site has an article on how to add a relay for feed power to the coils. There is always a solution, you just need to seek it out.
                          Last edited by Nessism; 07-22-2009, 11:31 PM.
                          Ed

                          To measure is to know.

                          Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                          Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                          Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                          KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

                            Comment

                            • TheCafeKid
                              #8
                              Did you check the plug boot?? Ive actually had them come apart after getting wet (yes, they were old)

                                Comment

                                • spyug
                                  #9
                                  Before jumping to a new coil I would do as Nessim suggests and try the coil relay mod. For a $6 or $7 part it could be a cheap solution for you.

                                  While you are at it, take time to clean and or replace all connectors and contacts that look dirty or corroded. As you no doubt know, corrosion creates resistance in the circuit ( causing voltage drop) and low voltage at the coil could be an issue.

                                  The coil relay mod is not difficult and well worth doing IMHO.

                                  Good luck with it.

                                  cheers,
                                  Spyug

                                    Comment

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