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  • Guardian Mode for no reason

    (Excuse the new thread but didn't have time to check all...)
    I have an 01 X9 with the MCX that is going into guardian mode for no reason at varying speeds. Most of the time it is when running about 30 mph or after an extended run. Temp is fine, oil pressure is fine. I have a 160 degree thermostat in it which also seems to be functioning properly. No leaks from water pump and a new impeller for the season with about 35 hours on it. The dealer cannot locate the issue. It throws no codes on diagnostics. They have had it in the water several times and cannot replicate it. As soon as I get it back, it will do it for me within the first day. I haven't checked myself to see if I am not somehow throwing off radiation...but unless someone on these boards has an answer I guess that is next. .Anyone ever had this issue?

  • #2
    What do you mean by gaurdian mode? I'm having a simliar issue with my 2005 X-star with an MCX. Take it to the dealer and they said they cannot read the codes because they are soft codes and are deleted off the computer after 3 warm up and cool down cycles.

    Dealer fixed what they thought was the issue and the next weekend we take the boat out and it throws check engine on the first set back! The boat looses power and sits in neutral flashing check engine with the engine running but no control with the throttle (is this what you mean by gaurdian mode?) We turn the boat off then on and it works fine.

    I think my issue has something to do with my perfect pass as I only experience the check engine with perfect pass on. Looking at buying my own code reader to scan the code as soon as it happens out on the water to solve the problem once and for all.

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    • #3
      its uh... limp mode... not guardian mode..

      check your fuel pressure

      Comment


      • #4
        That makes perfect sense to me. I have suspected the perfect pass, but didn't have mine on when it happened so I discounted it. But maybe you don't have to have it on for it to affect it. (Guardian mode is the computer stepping in and shutting everything down to about 2000 or less rpm/s. Won't let you go any faster-to protect the engine I suppose in case of overheating or low oil pressure).

        Haven't heard that about the deleting codes but that makes sense too. I have also suspected either a water pump or thermostat that is about to fail or at least the sensor thinks so, but discounted that because the dealer said it wasn't throwing out a code. Every time the guardian mode kicks in the first thing I do is look at the temp guage. It spikes to 170, then comes back down to 160 after a couple of seconds. Like yours the guardian mode goes away by just turning the key off and back on. Sometimes it might be another week before it does it again. But just need to get to the bottom of it so I'll stop pissing off skiers by suddenly stopping!

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        • #5
          Fuel pressure is always dead on. When it does it, I pop the guage on it to check. (I've put three fuel pumps in the boat...so that is usually the first place I go).

          Comment


          • #6
            Okay guys, I need the smartest MC guys on these boards to weigh in on this if possible. It is getting worse but 5 weeks later and still no one can solve it. I say worse because when it first started happening, I could kill the switch, turn it back on and it might be two days before it did it again. Now, it does it within 10 minutes every time. Since I am rapidly losing friends who happen to be riding when the boat goes into limp mode, I've got to come up with a solution. I tried some earlier advice of checking for corrosion between the coil and the ECM, but nothing there. As you can see on the video link, I checked fuel pressure during the event and the psi is normal. The engine surges between 1500 and 2200 rpm during the event. It NEVER clears itself up. Only killing the ignition will make it go away. Throttle position is irrelevant. The cruise control is off. A new occurance is that when I kill the ignition and fire it back up, at least one guage goes dead. Sometimes it is the speedo, sometimes it it temp guage, sometimes it is the oil pressure guage. But mostly it is the speedo or the temp guage. Never the fuel guage or the tach. I have no idea what that could mean but thought I should include it. Notice in the video that the CHECK ENGINE light never comes on during the event.

            To clarify the first post, (I always get the LTR and MCX confused), my engine is not an MCX, it is the LTR. And you CANNOT get the boat to experience this anomaly when it is cool. It only happens after the boat has been on a fairly hard run(30-37mph)with varying throttle inputs. The dealer had the boat for three weeks and ran two tankfuls of gas through it trying to make it do this and they could not. I got the boat back and did it within 30 minutes. The ONLY difference between me and the dealer's driving the boat is I always have a skier or tuber, etc and have several people in the boat. They did not. Other than that I can't think of anything I do different that could be triggering the event. PLEASE HELP IF YOU CAN!!!

            Here are a couple of videos of the "anomaly";

            http://youtu.be/-_ZET4BRR3E

            http://youtu.be/4Sp2PPcMjy4

            Comment


            • #7
              what are the temps when it does this? Does it do it when the engine is first started?
              1981 MasterCraft
              19' Skier 351W PowerSlot
              Long gone is the Trans AM waiting for another

              Comment


              • #8
                Whoops just re read your last post Sounds like something is getting warm and breaking contact. This could be a coil, ignition control module one of the two temp sensors. May need to have these checked
                1981 MasterCraft
                19' Skier 351W PowerSlot
                Long gone is the Trans AM waiting for another

                Comment


                • #9
                  Originally posted by 1redTA View Post
                  what are the temps when it does this? Does it do it when the engine is first started?
                  The temps hold pretty steady. For the times when the temp guage is working, I notice an immediate spike from 160 where it stays pretty much all the time, to 170 for a few seconds and then it goes back to 160. I was attributing that to the fact that the boat was traveling at operating speed but then suddenly cuts back to 1500 rpm when the "anomaly" kicks in. Not sure though. I first suspected a temp deal because it only does it after the boat has been run for at least 20 minutes, but the dealer says everything with the impellor and water pump check out.

                  Comment


                  • #10
                    Originally posted by 1redTA View Post
                    what are the temps when it does this? Does it do it when the engine is first started?
                    Originally posted by 1redTA View Post
                    Whoops just re read your last post Sounds like something is getting warm and breaking contact. This could be a coil, ignition control module one of the two temp sensors. May need to have these checked
                    Don't think they have checked the ignition control module. I'll email them with that suggestion. Thanks.

                    Comment


                    • #11
                      Update from the dealer; they have checked every single electrical connection in the boat(looking for a possible ground that could be causing it), the ECM inside and out, all related sensors, the coil and all associated wiring, the temperature equation(water pump, impeller, etc.). They have basically told me that everything in the boat checks out. They are suggesting now that I replace the computer. I'm fine to do that, but they also say it might not BE the computer and they can't refund the price of it should that not be the cause. So I am stuck. As of now I have a 4000 pound stereo system and that is about it. Where do I turn now? Does anyone know of a 209/X9 that has been totalled or junked that I could buy the computer out of for a lot cheaper than a new one?

                      Comment


                      • #12
                        The parts I was talking about don't really get checked, they get replaced because of a short inside the part at temperature. I'd start with the cheapest parts first when blind troubleshooting.
                        1981 MasterCraft
                        19' Skier 351W PowerSlot
                        Long gone is the Trans AM waiting for another

                        Comment


                        • #13
                          Mate, a long shot here! Check your battery connections and earth cables.

                          My motor was doing some strange things. Go into limp home mode and the gauges would stop working. Almost always when I was skiing so I asked why, I am the heaviest, ski the hardest and need all 310hp to drag me out so the motor was always warm and worked hardest when I skied.

                          A full check of the electrics and I found the battery connections loose. Replaced these along with new cables for earth and positive and that specific issue is now resolved.
                          Cheers

                          Mark

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                          • #14
                            Originally posted by willyt View Post
                            its uh... limp mode... not guardian mode..

                            check your fuel pressure
                            Delphi NEVER called it "limp mode"- it's called "RPM Reduction".

                            Comment


                            • #15
                              Originally posted by djr47 View Post
                              What do you mean by gaurdian mode? I'm having a simliar issue with my 2005 X-star with an MCX. Take it to the dealer and they said they cannot read the codes because they are soft codes and are deleted off the computer after 3 warm up and cool down cycles.

                              Dealer fixed what they thought was the issue and the next weekend we take the boat out and it throws check engine on the first set back! The boat looses power and sits in neutral flashing check engine with the engine running but no control with the throttle (is this what you mean by gaurdian mode?) We turn the boat off then on and it works fine.

                              I think my issue has something to do with my perfect pass as I only experience the check engine with perfect pass on. Looking at buying my own code reader to scan the code as soon as it happens out on the water to solve the problem once and for all.
                              IIRC, it was three key on, throttle max/min three times, key off cycles that cleared codes.

                              If the dealer wasn't using a diagnostic computer, they need to get in the game. This allows them to not only read the data in real time, it also lets them take a snapshot of what's happening at any moment in time and this needs to be done several times, to see if something changes when the throttle is static.

                              Comment

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