It's normal in a 4 cylinder engine to notice the load the engine takes when turning the AC on. You will feel slight vibrations and maybe slight increase in sound coming from engine. This is not something to the level where its unbearable or annoying to live with. Im assuming the car is un messed with as far as modifications and being a newer car, i dont know what it could be so early on. Is this your first honda/acura? Have you had a 4 cylinder before? Did you test drive the car when you bought it?

 

 

I don't notice any vibrations.

 

 

I was going to tell you the same, that it sounds like bad motor mounts or also since your car is used, it's possible (although pretty unlikely) the previous owner switched the motor mounts to "race spec" motor mounts, which will do that, too. I even looked into upgrading the motor mounts on my ILX and some guys posted on the 9th gen Civic SI forums that it drove them insane when they turned on AC and were idling. they said it wasn't noticeable while at speed. And as I posted on a different thread . GO. TO. DIFFERENT. DEALERS. STOP. GOING. TO. THE. SAME. ONE. Sign up for at LEAST 2-3 different dealers mailing lists so you can get 2-3 or more service coupons and specials sent to you every once in a while. Even if you like a particular dealer, always get a second opinion. The dealer likes trying to pretend nothing is ever wrong if they would likely have to pay to fix it. And they love exaggerating and overcharging. I'll repeat the story. My sister's TSX needed a new power steering pump. First Acura dealer says $3,500, and it's a death machine. Second dealer (Honda), says $2,000. 3rd guy, my mechanic, says $700, and it's been fixed and no issues at all. I get you guys are under warranty but so what? Go to a Honda dealer, go to a an Acura dealer and get a second opinion. Get a private Acura/Honda mechanic you trust and save money. The dealers in my area are now charging $80 for oil changes on specials with coupons. Honda dealers are at about $50-$60 with coupon. I don't go there anymore, last dealer coupon I used my oil change was $35. My guys charge $35-$50 for oil changes. Or i usually just buy my own premium stuff and give them a $20 bill for labor. Use to be $10, 5 years ago, but EVERYTHING has gone up.

 

 

I have issues passenger seat vibrates when i stop for sign / signal, the ride also very rough during speeds 50mph.
I went to two dealers , got nothing found, even have a case with ACM(no use). just 4.5k.
What are your suggestions? am gng crazy with this vibration.

 

 

Thanks for your response.
​What do you mean by "Also do you notice if the idle changes when you come to a stop? I noticed the vibration was caused by the idle being in flux while at a stop."?

 

 

Yes!! that is the exact problem, I switched to shell, still having same problems..
Other than changing gas, anything did u do to get away with that issue?

Thanks

 

 

Raising the idle rpm will help with vibration, 4 cylinder cars always vibrate more than cars with more. Ever sit on a running Harley?

 

 

I'll just link the idle relearn procedure here.

 

 

I've never had an issue. I knew what I was buying and my '16 is happy.
If you want smooth/vibration free, you need a V or W12.
The video isn't mine.

 

 

My '11 xb passenger seat would vibrate/rattle if the seat was too upright in a certain position. Getting the seat positioned correctly, stopped the problem.