The famous: "Vibration at idle while in gear" - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 67 Old 02-27-2013, 06:21 PM Thread Starter
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The famous: "Vibration at idle while in gear"

I have a 2006 Accord Sedan Ex 4cyl. with 77k miles. Everything on the car is great, except this vibration at idle while in drive. For example, when I am stopped at a red light I feel this vibration through the steering wheel and in the driver seat. Now, when I put it in reverse (foot still on the brake and vehicle stopped) the vibration goes away. Also, when I turn on the headlights the rpm slightly increases and the vibration reduces greatly. It almost disappears.

I took the car to a Honda dealership and had the Shop Foreman install a new Front, Side, and Rear motor mount costing me $700 out the door. He also did a computer update that took 15 minutes to install, but did not charge me. He claimed that normally it costs $100 to do this update.

Well, the vibration did get slightly better but it is still there. I am thinking about just going ahead and replacing the lower transmission mounts myself since they look very easy to do. The problem is I jacked the car up yesterday and looked at the lower mounts and they looked worn, but not torn. My transmission is shifting excellent. This might be wasting my time.

The shop foreman test drove my car and said everything is ok and normal. He says the slight vibration is on alot of cars. But I just replaced 3 new Honda mounts??? I know this car did not vibrate at idle when it was new.

Anybody else have/seen this issue. I'm getting tired of chasing it.

All responses appreciated.

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post #2 of 67 Old 02-27-2013, 06:47 PM
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Wow thats a lot of money for the mounts...

Engine Mount
All Mounts 2.1 hr
+ $200 parts


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post #3 of 67 Old 02-27-2013, 07:17 PM
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Ha, he was just trying to make you feel better / "buttering you up" after raping your wallet for a ridiculous amount for the mounts. Were they the ones who diagnosed your issue as being mounts or did you walk in and say "I want all three mounts replaced?"

It is rather "normal" for 4cyl's to have shakes/vibrations in gear while stopped. One reason why I couldn't wait to get back into a V6!

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post #4 of 67 Old 02-27-2013, 07:41 PM Thread Starter
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Yeah it was alot of money, but the HONDA OEM mounts cost over $400 alone.

Why do Honda 4-cyl.'s vibrate like this at idle?? Anybody else have this issue with their car?
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post #5 of 67 Old 02-27-2013, 07:59 PM
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It's not specific to Honda, bud. It's a LOT of 4 cylinder engines. It's honestly nothing to worry about and I wouldn't throw any more money at the "issue" - this is where the good ol' sayin' "If it ain't broke, don't fix it" comes in

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post #6 of 67 Old 02-27-2013, 08:02 PM
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The famous: "Vibration at idle while in gear"

Without getting into a detailed explanation on timing... 4 cylinder cars vibrate because of the balancing of the moving parts of the engine. 6 cylinder cars don't vibrate as much because they are more balanced. Same reason why 8 cylinder engines are the smoothest of the three.
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post #7 of 67 Old 02-27-2013, 08:11 PM
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i would think motor mount.

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post #8 of 67 Old 02-27-2013, 08:21 PM Thread Starter
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My 2000 Toyota Camry with 82k miles 4cyl. 2.2L does NOT vibrate at all. It is very smooth in all gears at idle. Also, my 2006 Honda Accord 4cyl. did NOT vibrate at idle when the car was new. How do you explain this??
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post #9 of 67 Old 02-27-2013, 08:22 PM
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Slightly tangental, but I found an interesting article on Wikipedia about why 4 cylinders are so much rougher:

"Six-cylinder designs are also more suitable for larger displacement engines than four-cylinder ones because power strokes of pistons overlap. In a four-cylinder engine, only one piston is on a power stroke at any given time. Each piston comes to a complete stop and reverses direction before the next one starts its power stroke, which results in a gap between power strokes and noticeable vibrations. In a six-cylinder engine (other than odd-firing V6s), the next piston starts its power stroke 60 before the previous one finishes, which results in smoother delivery of power to the flywheel. In addition, because inertial forces are proportional to piston displacement, high-speed six-cylinder engines will suffer less stress and vibration per piston than an equal displacement engine with fewer cylinders."

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Originally Posted by elvis1977 View Post
My 2000 Toyota Camry with 82k miles 4cyl. 2.2L does NOT vibrate at all. It is very smooth in all gears at idle. Also, my 2006 Honda Accord 4cyl. did NOT vibrate at idle when the car was new. How do you explain this??
My guess would be that you've owned many 4 cylinder cars in the past and that you're used to it. I was brought up on v8s and v6s. I can tell immediately that I'm in a 4 cylinder car, no matter what kind of engine mounts or sound deadening is used to try and hide it. My guess at your vibration that appeared out of nowhere would be the transmission mounts, since the motor mounts have all been changed. Either that or the active hydraulic mounts aren't working correctly. There is a hydraulic system that makes the mounts tighter and looser, dependent upon RPM. This is what makes you not notice the vibration as much.
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post #10 of 67 Old 02-27-2013, 08:37 PM
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I have no vibration at all.

Is it transmission since it happens in gear?

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post #11 of 67 Old 02-27-2013, 08:43 PM Thread Starter
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If 4-cyl. engines vibrate more than 6-cyl.'s, then why don't the engine engineers upgrade or advance their motor mount design's to compensate for the extra stress (vibrations)?

If you go and sit in a 2013 Accord 4cyl. tomorrow, it will probably idle like silk. Probably not as smooth as a 6cyl., but very smooth. It has new motor mounts like my car does now. I'm stumped!!
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post #12 of 67 Old 02-27-2013, 08:43 PM
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I drive a 5 spd... I noticed I had a rough idle so I changed my spark plugs and the rough idle was gone, smooth as a kitten. 2 weeks later it was rough again...
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post #13 of 67 Old 02-27-2013, 08:51 PM Thread Starter
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Quote:
Originally Posted by 2006accord4 View Post


I have no vibration at all.

Is it transmission since it happens in gear?
You have a manual transmission. I have an automatic. Vibrations are more noticeable in automatics.

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Originally Posted by Anomaly View Post
My guess would be that you've owned many 4 cylinder cars in the past and that you're used to it. I was brought up on v8s and v6s. I can tell immediately that I'm in a 4 cylinder car, no matter what kind of engine mounts or sound deadening is used to try and hide it. My guess at your vibration that appeared out of nowhere would be the transmission mounts, since the motor mounts have all been changed. Either that or the active hydraulic mounts aren't working correctly. There is a hydraulic system that makes the mounts tighter and looser, dependent upon RPM. This is what makes you not notice the vibration as much.
Only my front motor mount is hydraulic controlled by the computer depending on rpm's. I know it is working correctly, because when I turn on my headlights the rpm's increase slightly and vibrations decrease quite a bit.

Transmission mounts looked worn from underneath, but not torn. Also, no vibrations when I put the car in reverse with lights off. Vibrations occur in drive only with headlights off.
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post #14 of 67 Old 02-27-2013, 10:55 PM
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The famous: "Vibration at idle while in gear"

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Originally Posted by elvis1977 View Post
Only my front motor mount is hydraulic controlled by the computer depending on rpm's. I know it is working correctly, because when I turn on my headlights the rpm's increase slightly and vibrations decrease quite a bit.

Transmission mounts looked worn from underneath, but not torn. Also, no vibrations when I put the car in reverse with lights off. Vibrations occur in drive only with headlights off.
That's quite an odd set of circumstances. Maybe the rubber on the transmission mounts has hardened. Rubber tends to dry out. There are also mounts on top of the transmission, I believe. If they are also worn out then that could give it enough play to create a nasty vibration. Other than that, I would say get a helper, put the car on jack stands and try to replicate the vibration. Maybe you'll be able to see it.
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post #15 of 67 Old 02-28-2013, 12:31 AM
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I have owned nothing but 4 cylinder cars my whole life. My Accord is the first one to vibrate. My last car had 2 engine mounts and a dogbone with no vibrations. My accord has 6 mounts and vibrates.

I would loosen the 3 mounts on the engine. Start it up and put in in D and back in R a few times. Shut off the car and tighten up the mounts.

That fixed mine while stopped at lights, but when it is first started and idling high there isn't much you can do. I wish so bad I could get someone to program my car not to do that. Last week the roads here were icy. I stopped at my first light, it turned green and I let my foot off of the brake petal. My front tires started spinning without my touching the gas. Brilliant design!


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