Engine vibration?

Tiny
DRAGO286
  • MEMBER
  • 2012 CHEVROLET TRAVERSE
  • 3.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 138,000 MILES
I have the vehicle listed above, and it has an engine vibration at 1,000 RPMs to 1,500 RPMs, it runs smooth before and after that. There are no codes and it runs fine other than that.
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Saturday, February 10th, 2024 AT 4:52 AM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,716 POSTS
Hi,

If there are no codes, it leads me to question things such as engine or transmission mounts, CV joints and so on.

Where is the vibration most noticeable? For example, do you feel it more in the steering wheel, the seat, or the floor? Also, do you only feel it when the vehicle is in gear and accelerating?

Let me know. Since there are no codes, I'm leaning away from a misfire or sensor-related issue.

Take care,

Joe
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Saturday, February 10th, 2024 AT 5:15 PM
Tiny
DRAGO286
  • MEMBER
  • 5 POSTS
Hi Joe, thank you for your response. The car vibration is felt in the seat and in the dash, it does it in park, neutral and drive. Also, when the hood is open you can see the engine vibrate, it's not a big vibration. It's been doing this for the last 4 months and it hasn't got any worse, but I'm worried it would harm something, plus it's annoying knowing it's there. I cleaned the throttle body, the MAF, changed the purge sensor, and changed the air filter.
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Sunday, February 11th, 2024 AT 4:03 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,716 POSTS
Hi,

It could be a mount, but I want you to try something for me. Start the engine and let it idle. Turn the A/C on and pay attention to the idle speed. Does it drop, stay the same, increase?

Let me know.

Joe
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Sunday, February 11th, 2024 AT 2:46 PM
Tiny
DRAGO286
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  • 5 POSTS
My A/C won't kick in until the outside temperature is above 40 degrees. I'll let you know when it does. Why would the A/C be relevant to the vibration?
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Monday, February 12th, 2024 AT 7:47 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,716 POSTS
Hi,

Good question. I asked because the added load may result in feeling the vibration at idle. If that is the case, my first suspect would be a mount issue.

Let me know.

Joe
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Monday, February 12th, 2024 AT 3:24 PM
Tiny
DRAGO286
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  • 5 POSTS
I started the car then turned on the A/C, the idle speed stayed the same.
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Tuesday, February 13th, 2024 AT 5:34 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,716 POSTS
Hi,

Okay, that is a good thing. At this point, I would suggest inspecting the engine mounts for evidence of cracks, dry rot, or damage.

Take a look through this link and let me know if it helps:

https://www.2carpros.com/articles/comprehensive-guide-to-checking-and-replacing-automotive-engine-mounts

Let me know.

Joe
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Tuesday, February 13th, 2024 AT 2:39 PM
Tiny
DRAGO286
  • MEMBER
  • 5 POSTS
Thanks for your help, Joe. I'll take the car in and have the mechanic look at the mounts. The biggest mystery to me was why does the vibration only happen between 1, 000 RPMs to 1,500 RPMs and run smooth as silk before and after.
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Wednesday, February 14th, 2024 AT 4:19 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,716 POSTS
Hi,

That simply could be the point where the vibration is bad enough to be felt. If you told me the check engine light was staying on, I would suspect a misfire or other engine-related issue. In this case, it must be a mount, or I guess it could be a balance issue with an axle/CV joint or something similar, but I feel that is less likely.

If you have a chance, let me know what they tell you. I'm interested in knowing.

Take care and let me know if you have other questions.

Joe
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Wednesday, February 14th, 2024 AT 7:13 PM

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