vibration at idle problem
Originally Posted by chikoo
got a call from the Dealer that he has fixed the idle vibration. Neat.
Now I will have to find out if he has really fixed it or just b/s !!!
Now I will have to find out if he has really fixed it or just b/s !!!
Lexus Champion
Joined: Jan 2006
Posts: 3,763
Likes: 6
From: TX
Ok. Have it back.
BS!!
Problem is as bad it was. I have called up Lexus and the district Service Mgr is now involved. Next week they will arrange for another inspection at another dealer. Let us see how it goes.
BS!!
Problem is as bad it was. I have called up Lexus and the district Service Mgr is now involved. Next week they will arrange for another inspection at another dealer. Let us see how it goes.
Instructor
Joined: Mar 2002
Posts: 1,026
Likes: 2
From: NV
After reading this thread I notice the same sound, but it is slight, nothing that I would report to the dealer but it is annoying. I also realize that I have been sometimes going to neutral while stopped to quiet the sound. I don't see this as a big deal but I do have to wonder why the engine/tranns seems to go under such stress to run in a braked position?
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CL Community Team
Joined: Apr 2004
Posts: 17,338
Likes: 213
From: Miami, Florida
Originally Posted by chikoo
I was reading other Lexus boards and it appears that the Idle Air control Valve IACV might be the prime culprit for its inability to maintain idle speed and thus a smooth idle.
Lexus Champion
Joined: Jan 2006
Posts: 3,763
Likes: 6
From: TX
Here is the latest run down of when the vibration occurs:
1. Vehicle is throughly warmed up
2. Light switch is on Auto or Off
3. Gear selector is in D
4. Foot on the brake pedal
5. AC is switched off
At this time, the idle will drop to maybe 600 and the vibrations and the ensuing drone in passenger cabin is unbearable.
Now look at the changes in some of the variables and how it affects the scenario:
#1:
========
If I switch on the lights (not on auto), the idle speed goes up to ~750 and once again idle vibration is there, but minimal.
#2:
========
If I take the foot of the brake pedal and instead use the e-brake, idle speed goes up a bit, ~700-750 and the vibration is there, but minimal.
Now what do you think is the probable cause?
In my opinion, the mounts are certainly worn as I can feel some vibrations in any case.
But the dropping of the idle speed and the resulting increase in vibration is of concern here.
1. Vehicle is throughly warmed up
2. Light switch is on Auto or Off
3. Gear selector is in D
4. Foot on the brake pedal
5. AC is switched off
At this time, the idle will drop to maybe 600 and the vibrations and the ensuing drone in passenger cabin is unbearable.
Now look at the changes in some of the variables and how it affects the scenario:
#1:
========
If I switch on the lights (not on auto), the idle speed goes up to ~750 and once again idle vibration is there, but minimal.
#2:
========
If I take the foot of the brake pedal and instead use the e-brake, idle speed goes up a bit, ~700-750 and the vibration is there, but minimal.
Now what do you think is the probable cause?
In my opinion, the mounts are certainly worn as I can feel some vibrations in any case.
But the dropping of the idle speed and the resulting increase in vibration is of concern here.
Out of Warranty
Joined: Aug 2001
Posts: 14,925
Likes: 13
From: Houston, Republic of Texas
Your description seems to indicat your idle is set WAY low. Unlike a straight-6, the V-6 is in inherently unbalanced engine and will not be nearly as smooth - particularly at idle. Turning on the AC or engaging an electrical load will pick up the throttle slightly, as designed, partially relieving the problem - as you've experienced. If you set your idle adjustment to a minimum of 700-850 (check your manual) the problem should largely disappear.
Lexus Test Driver
Joined: Jun 2003
Posts: 942
Likes: 0
From: Rhode Island
I thought i might contribute, im seeing the same problem in my 2000 Solara v6 which uses the same engine, if its warm outside its smooth but under 40 i feel the vibrations in the steering wheel, and if its really cold my seat vibrates too.