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A strange problem - engine stumbling and idling rough, now all sorts of codes - any ideas?

Spyder Hawk

Member
Hey group,
I have a 2018 Can-Am Spyder F3 Limited. Engine wise it is stock and it has never had a problem until now. I was coming home, about a block from my house, when I came to a stop sign. When I left the stop sign the bike stumbled for a second and then took off. I thought it was strange but continued home. I rounded the corner and the bike downshifted real hard. I came to a stop and the bike started to idle rough. When I let my foot off the brake the bike moved forward without the throttle being engaged. I know a little bit of movement is normal but I clocked it at 5 to 7 miles an hour with no assist from the throttle. I pulled in to my driveway and it started to idle very rough but the RPM's never changed. They stayed consistent at 800 to 900 despite what the engine did. The brakes also feel kind of spongy now.
I did all the things I can do on my own. I changed the fuel filter, fuel lines, air filter, radiator fluid, oil, brakes, and have taken it for 3 diagnostics. All says the bike is good. No codes or warning signs on the first diagnostic. The second one the dealership had the 18 year old kid that washes the bikes do the diagnostic and he drained the battery. I have a lithium battery and the kid hooked it up to a standard battery tender and screw up one of the cells in the battery. So now it is throwing, according to him, all kinds of codes. He wouldn't tell me what codes and refused to give me any paperwork. I left the dealership and now the bike will not downshift and runs worse than before. I replaced the battery and that brought the voltage back up where it should be. The rest of the problems are still there.
I took it for another diagnostic some 100 miles from me. All the shops in California seemed to have lost all Mater Certified Can-Am Mechanics. This one shop that I have taken it to now has a platinum rating but even they have lost their mechanic as of 2 months ago. They were nice and professional and scoped out the bike for me, with BUDS 2, for 57.00 bucks. They came up with codes that relate to the ECM, VCM, and TCM. The most relevant they said was P2806 the Gear Position Sensor. Which was a big job because the sensor is inside or behind the transmission I think. He did point out that there was a grinding noise coming from the transmission side of the engine. As far as I know it has always sounded like that but I listened to other F3's and none of them sound like mine.

Anybody heard of or had this problem? Any kind of help would be nice because I am stumped.
 
All those codes coming up after your battery was killed would almost certainly be in response to the low voltage from the dying battery, and should go away once the voltage is corrected, but of course they'll still be stored as having occurred. 😖 With any luck, they shouldn't be a problem, and I hope you didn't pay out $$ to fix things that possibly didn't really need fixing at all!! There's many, many threads and reports here of this cascade of multiple codes due to low voltage, and rarely are they anything to worry about, except for the need to recharge/replace the battery! :cautious:

As for the rest, I wonder if all the rest was a battery voltage problem too?? Could your battery have already been troubled before the bike washer got to it?? The revs staying stable while the engine stumbled could well just be the electronic tacho not catching up in time to show the changes, and just about everything else has been associated with low voltage before too - apart from the 'grinding noise'?? Altho even those, once you start worrying, can be quite normal but not previously recognised. I wonder?? :unsure:

Has it happened again, or gone away and never come back? :unsure::unsure:
 
Hey Peter,
The battery was replaced but the problems still remain. The battery was fine before the crappy dealer got a hold of it. They expect me to trust them to do the sprocket recall too, lol. It will be a cold day in hell I can tell you that.
 
Hey Peter,
The battery was replaced but the problems still remain. The battery was fine before the crappy dealer got a hold of it. They expect me to trust them to do the sprocket recall too, lol. It will be a cold day in hell I can tell you that.
Have all the codes gone, and you're just left with the rough running etc, or do you still have all the codes and the rough running?? :unsure:

If you've still got them all, and or the engine won't even start, I wonder if water boy killed more than just the battery?! 😖
 
Sure, sounds like you need someone that knows transmissions! Good luck hope that gremlin comes out so you can chop his head off. :unsure:
 
Hey Hawk. We may not be able to fix it here, and I don't necessary KNOW transmissions, but long before you had any codes and long before you had a battery get fried, you had a dragging clutch. I think that we can all agree on that. You didn't mention otherwise so I assume it's still dragging. That's what started this. Even though there was a drag on the engine, the ECM was attempting to maintain proper idle speed as it should. That's why your idle speed was normal but you were traveling at 5 - 7 MPH.

The SE6 clutch is hydraulically operated. The Hydraulic Control Module (HCM) applies oil pressure to the clutch pack to supply the clamping force to engage the clutch through the use of various solenoid valves and by sensing engine parameters. To disengage the clutch, the opposite occurs. The solenoid valves reposition and dump off oil pressure, allowing the springs inside the clutch to remove the clamping force.

So then, do we have a hydraulic problem or a mechanical problem inside the clutch. That's where you need to find a competent shop that can do more than just read the codes. Don't know what kind of diagnostics you had done, but the bike can't be good if the clutch is dragging, downshifting hard, and traveling that fast with the foot off the brake. Clearly, a dragging clutch will interfere with shifting, put a load on the engine, and no doubt trigger codes related to shifting and engine control. That's most likely where the codes that you have now are coming from. I don't think there is anything wrong with your GBPS. Which, by the way, is not a big job except for removing a couple of body panels and a splash pan, and running a RESET in BUDS2. It's there on the left side of the gearbox. See pic. It's just sensing the shifting malfunctions.

As long as you have been using the proper oil for wet clutches, and doing the maintenance, including changing the HCM filter on schedule, it looks like this could be just one of those sudden mechanical failures that happen. You need a good shop to run all the HCM and clutch diagnostics to find the root cause. The only good shop I know of out west there is in Vancouver, Washington. I'm sure you don't want to go all that way. Maybe someone else has some leads on that. Good luck.



SE6 GBPS.JPG
 
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Hey Hawk. We may not be able to fix it here, and I don't necessary KNOW transmissions, but long before you had any codes and long before you had a battery get fried, you had a dragging clutch. I think that we can all agree on that. You didn't mention otherwise so I assume it's still dragging. That's what started this. Even though there was a drag on the engine, the ECM was attempting to maintain proper idle speed as it should. That's why your idle speed was normal but you were traveling at 5 - 7 MPH.

The SE6 clutch is hydraulically operated. The Hydraulic Control Module (HCM) applies oil pressure to the clutch pack to supply the clamping force to engage the clutch through the use of various solenoid valves and by sensing engine parameters. To disengage the clutch, the opposite occurs. The solenoid valves reposition and dump off oil pressure, allowing the springs inside the clutch to remove the clamping force.

So then, do we have a hydraulic problem or a mechanical problem inside the clutch. That's where you need to find a competent shop that can do more than just read the codes. Don't know what kind of diagnostics you had done, but the bike can't be good if the clutch is dragging, downshifting hard, and traveling that fast with the foot off the brake. Clearly, a dragging clutch will interfere with shifting, put a load on the engine, and no doubt trigger codes related to shifting and engine control. That's most likely where the codes that you have now are coming from. I don't think there is anything wrong with your GBPS. Which, by the way, is not a big job except for removing a couple of body panels and a splash pan, and running a RESET in BUDS2. It's there on the left side of the gearbox. See pic. It's just sensing the shifting malfunctions.

As long as you have been using the proper oil for wet clutches, and doing the maintenance, including changing the HCM filter on schedule, it looks like this could be just one of those sudden mechanical failures that happen. You need a good shop to run all the HCM and clutch diagnostics to find the root cause. The only good shop I know of out west there is in Vancouver, Washington. I'm sure you don't want to go all that way. Maybe someone else has some leads on that. Good luck.



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Thanks for the info Snowbelt. We are kind of stuck up a creek here in North Cali. There don't seem to be anyone that works on Spyder's anymore and there is only so much the backyard mechanic can do. I'll talk to the shop tomorrow to see if they have any word yet from BRP.
 
Have all the codes gone, and you're just left with the rough running etc, or do you still have all the codes and the rough running?? :unsure:

If you've still got them all, and or the engine won't even start, I wonder if water boy killed more than just the battery?! 😖
Peter,
It is strange because it throws different codes every time. Leave it to me to have a strange problem. It's still running the same, rough and tumble, as it was.

It starts and seems OK when it is on the freeway. But as soon as you slow down it gets all upset.
 
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