Yamaha 200 hpdi (Z200TXRB) spark issues

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  • Yamaha 200 hpdi (Z200TXRB) spark issues

    I know that #2 and #3 cylinder are passive on a 200 HPDI when in neutral. According to YDS my #5 and #6 are also not firing in neutral, but fire once I put the engine in gear. YDS shows the TPS up at 1.14V which is way out of spec... is this related to #5 and #6 not firing in neutral. Also, can't perform any active tests on YDS... YDS says to put motor in neutral (already in neutral). Any suggestions?

  • #2
    Originally posted by Madaket View Post
    I know that #2 and #3 cylinder are passive on a 200 HPDI when in neutral. According to YDS my #5 and #6 are also not firing in neutral, but fire once I put the engine in gear. YDS shows the TPS up at 1.14V which is way out of spec... is this related to #5 and #6 not firing in neutral. Also, can't perform any active tests on YDS... YDS says to put motor in neutral (already in neutral). Any suggestions?
    What are the chances?
    This is on my email.
    This the same engine and person?
    According to YDS it’s not firing on 5 and 6 in neutral. I know 2 and 3 do not fire in neutral by design. When I put it in gear I get fire on all 6 cylinders, I then put it back to neutral and again 5 and 6 shut off. There are no fault codes. I thought perhaps the Shift Position Switch was faulty so I swapped the one from my port to my starboard and had same results.

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    • #3
      Let's see if Jedro will jump in on this.
      Engine Sales and Service
      Ph +1 954.463.1515
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      954.463.4904
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      • #4
        Click image for larger version

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ID:	136213 Notes from a bygone era.
        Click image for larger version  Name:	20210914_045741.jpg Views:	0 Size:	1.20 MB ID:	136214
        Engine Sales and Service
        Ph +1 954.463.1515
        Fx +1
        954.463.4904
        Toll Free: 800.622.6747

        [email protected]
        www.parkeryacht.com

        Comment


        • #5
          First fix the TPS problem.

          The motor may be in neutral but a faulty neutral position switch or related wiring will cause the ECU to think that it is not in neutral. Which will result in YDIS saying to put the motor in neutral.

          Have you physically confirmed that cylinders 5 and 6 do not have spark?

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          • #6
            Originally posted by Parker Yacht View Post
            Let's see if Jedro will jump in on this.
            He will. He has.

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            • #7
              Thanks Jethro1 for responding and your insight. #5 and #6 are definitely not firing in neutral. I removed the plugs wire and no change in engine sound. It also reads on YDS that 5 and 6 are not firing. However, in idle forward YDS shows all 6 firing.

              Is it possible I hit the TPS when I was either installing or removing the cowling and knocked it out of spec?

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              • #8
                Originally posted by Madaket View Post
                I know that #2 and #3 cylinder are passive on a 200 HPDI when in neutral. According to YDS my #5 and #6 are also not firing in neutral, but fire once I put the engine in gear. YDS shows the TPS up at 1.14V which is way out of spec... is this related to #5 and #6 not firing in neutral. Also, can't perform any active tests on YDS... YDS says to put motor in neutral (already in neutral). Any suggestions?
                Originally posted by Parker Yacht View Post
                Click image for larger version  Name:	image_15683.jpg Views:	26 Size:	734.9 KB ID:	136213
                Please read the hand written note on "Stationary Test".
                Engine Sales and Service
                Ph +1 954.463.1515
                Fx +1
                954.463.4904
                Toll Free: 800.622.6747

                [email protected]
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                • #9
                  Cylinders 5 and 6 also won't fire in neutral when the RPM is above X, The throttle opening as reported by the TPS may also be a factor.

                  But that is based on everything else working according to Hoyle.

                  If the TPS is way out of specification, which it is, all bets may be off when it comes to what the motor may be doing.

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                  • #10
                    I’m going to correct the TPS and report back my findings.

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                    • #11
                      Typically speaking, Yamaha's don't go bad electrically, unless something happens, IE: They get wet, fire or someone tinkers with them.
                      Most Yamaha issues start with fuel, most "technicians" never figure that out and start making "adjustments", then the fight started.
                      Engine Sales and Service
                      Ph +1 954.463.1515
                      Fx +1
                      954.463.4904
                      Toll Free: 800.622.6747

                      [email protected]
                      www.parkeryacht.com

                      Comment


                      • #12
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                        Engine Sales and Service
                        Ph +1 954.463.1515
                        Fx +1
                        954.463.4904
                        Toll Free: 800.622.6747

                        [email protected]
                        www.parkeryacht.com

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                        • SIM
                          SIM commented
                          Editing a comment
                          Add Youtube to the last one. ....lol

                      • #13
                        With close to 1000 hours on my motors I have decided to pull the injectors and have them sent out for cleaning and eliminate them as a possible cause to my problem. I will also replace both of my TPS sensors as I have learned these are potentiometers and can wear out over time. Once I get the injectors back and installed I will provide an update. Thanks again Ole and Jethro.

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                        • #14
                          Isn't it kind of odd to get the injectors cleaned if you have confirmed you have a spark issue? or is the spark issue a non event?

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                          • #15
                            I have spark on all 6 in gear, not in neutral. From all the reading I’ve done I have learned how lean these HPDI motors run and injectors not performing to spec is the leading culprit to irrevocable failure on these engines.

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