Engine Shuttering / Hesitation During Acceleration

[1551retired]

The hesitation/shuttering only occurs when opening up the throttle and accelerating at about 3500 rpm in 2, 3, 4, or 5th gear.

Are you shiffing at 3500rpms,??
Or does it at shutter as you reach 3500 and then when you accelerate''past'' 3500 it runs fine.??

I shift around 4500 rpm or above. Shuttering and loss of power happens when accelerating 3500 and above .

 

[NancysToy]

Called the dealer to get a status this afternoon. BRP has advised the tech to check the intake valve clearances.:dontknow: The tech will not be able to complete the valve check until early next week.

The bike seems run fine for the first 30 or 40 miles before the problem occurs. The hesitation/shuttering only occurs when opening up the throttle and accelerating at about 3500 rpm in 2, 3, 4, or 5th gear. It idles fine after getting hot and seems to run ok at a constant/steady speed. Is it possible that an intake valve clearance problem would cause the problem I'm experiencing?

Yes, inadequate valve clearance could cause such a problem when the engine gets good and hot.

 

[1551retired]

Yes, inadequate valve clearance could cause such a problem when the engine gets good and hot.

Thanks for that information! That makes me more confident the tech is on the right track. So assuming it is a valve clearance problem do you think an adjustment would fix the problem? I would hope the intake valve wouldn't be burned with only 8,000 miles and would need replacing.

 

[NancysToy]

Thanks for that information! That makes me more confident the tech is on the right track. So assuming it is a valve clearance problem do you think an adjustment would fix the problem? I would hope the intake valve wouldn't be burned with only 8,000 miles and would need replacing.

Intake valves are less likely to burn than exhaust valves. Adjustment should cure it, provided the valve isn't bent and moves freely, and that there is no carbon buildup on the valve seats. I'm sure they make it right for you, even if it becomes more involved.

 

[1551retired]

Not a Intake Valve Problem

Tech checked the intake valve clearances per BRP recommendation and found no problem. After several discussions with BRP the tech convinced them to change out ignition coils and wiring. Parts are on order and will hopefully be in Tuesday. :spyder2: has been at dealer for over two weeks now. Sure hope this takes care the problem.

 

[Mr. White]

I sure hope this clears your problem. I am glad your dealer is trying to fix your scoot...some don't as you know.

:spyder2:

 

[1551retired]

Coil or Plug Cable Not the Problem - What's next?

Tech changed out the ignition coil and plug wire. He then test drove for about 45 minutes and said it ran fine. I picked it up today and rode about 45 miles before it started acting up again. Took it back to the dealer tech and sugguested they check the purge valve or maybe it needs a new ECM. It has now been in the shop for over three weeks. The dealer tech seems to keep putting it on the computer every time I bring it back and acting up, and then calls BRP. Wouldn't you think BRP would have some history of this type problem and suggest what needs replacing? Seems like the tech needs BRP to approve anything he wants to try.

Another week or more without a ryde. Good thing the RT isn't my only means of transportation.

BRP are you listening to any of this!!!

 

[spyryder]

I'd have a look at the crank sensor as mentioned in post #18

 

[1551retired]

Problem Solved!

Got the :spyder:back yesterday after being in the shop for four weeks. Took it for a 65 mile ride and didn't experience the problem:yes:. The shop finally found a vacuum leak and replaced the purge valve.

 

[BajaRon]

Got the :spyder:back yesterday after being in the shop for four weeks. Took it for a 65 mile ride and didn't experience the problem:yes:. The shop finally found a vacuum leak and replaced the purge valve.

They sure took the tough way around that mountain. The problem is the symptoms you had can be caused by any number of things. Swapping out parts till you find the culprit is the old school way of doing it. But computers can only tell you so much.

Simple problem, just hard to find. Glad you got your ride back for the summer!

 

[CyncySpyder]

Glad they finally got it fixed & your back in the saddle again

nojokeI know how frustrating all the waiting & failed fixes can be :banghead:

:joke:Hopefully, this time is it & you get to ENJOY the ryde again ray:​