2014 Ford C-Max Hybrid - Vibrates

My car vibrates when I step on the gas usually from a complete stop. The dealership replaced the motor mounts in February, but the car has begun vibrating again. They changed the mounts again, almost a year later because they said the rubber was defective. Now they are in conference with their engineers because they don’t know what to do. Why would it still vibrate?

Read through this discussion. See if there’s anything helpful in this discussion, particularly the final solution post.


CSA
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It vibrates as you accelerate from a complete stop? hmmm … Is it better or worse comparing a rapid acceleration vs a gradual one? Better/worse comparing going straight vs turning from the stop? What part of the vehicle seems to be the source of the vibrations? Wheels? Engine compartment? Steering wheel? Transmission lever? Foot pedals? Floor? Is there any sound or noises associated with the vibration? Are the dealership techs able to notice this vibration during a test drive too?

It’s worst if I accelerate slowly, it’s not as obvious if I go faster, but it still does it. Once I get moving, it stops vibrating and doesn’t seem to do it again until I stop and have to start again. Going straight, it vibrates the same as turning. Hard to tell where it’s coming from. It’s not the foot pedals. Seems like it’s the whole car vibrating. I don’t think it’s coming from the wheels or steering wheel and I don’t notice any noise/sound other than the vibration.

It does not vibrate all the time, seems to vibrate when the car is colder, when it’s been sitting for a while. It does seem to happen in low gear, during acceleration. It’s an automatic, so it’s not a clutch issue. Let me throw this wrench into the works: I don’t recall it ever vibrating like that when it’s in electric mode.

The tech did reproduce it, so it’s not just in my mind - but it sure would be cheaper! He also drove another similar CMax and said the other CMax does it too, but not as obvious as mine.

Any ideas? Thanks for responding.

Did the mechanic specifically check the harmonic balancer/crankshaft pulley and all motor mounts?
CSA
:palm_tree: :sunglasses::palm_tree:

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Double check the engine oil level and condition & (if applicable) the transmission fluid level. If both are ok, ask your shop to measure the fluid pressures, especially the engine oil pressure.

I have made note of all the suggestions and will contact the dealership mechanic to see what he thinks. Will post the outcome whenever that happens. Was planning a move half way across the country but all is on hold for now! Thanks for all your help.

Thanks! Please do. Good luck with it!
CSA
:palm_tree: :sunglasses: :palm_tree: