vibration at idle problem
CL Community Team
Joined: Apr 2004
Posts: 17,338
Likes: 213
From: Miami, Florida
Originally Posted by chikoo
Can I even adjust the idle? I thought this was controlled by the computer via the IACV.
By the way, what is the recommended idle at "P" and at "D"?
By the way, what is the recommended idle at "P" and at "D"?
I noticed that by tightening the accelerator cord in the throttle body that this 'nudged' ever so slightly upward.
Lexus Champion
Joined: Jan 2006
Posts: 3,763
Likes: 6
From: TX
Originally Posted by Lil4X
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.
my other vehicle is a Mazda6 V6 and you should see it idle. It would make you think that the engine is not even running, and the idle does not even fluctuate when I start on the lights or defroster or any other electrical item and it has 38000 miles on it, compared to the 47000 miles on the RX300.
Lexus Test Driver
Joined: Jul 2001
Posts: 959
Likes: 2
From: New Jersey
Both my RX's and the 3 loaners I drove all had this slightly rough idle. Being subjective this is a tough item to nail down on a discussion forum like this. Most owners will claim they don't have the rough idle until you sit in the car with them and point it out to them. My Olds Alero v6 does idle much smoother.
CL Community Team
Joined: Apr 2004
Posts: 17,338
Likes: 213
From: Miami, Florida
Originally Posted by chikoo
per Lexus press releases, NVH means NO Vibration & Harshness.
They have to step up find a fix for this problem. The lexus cust rep is now involved and let us see where it goes.
They have to step up find a fix for this problem. The lexus cust rep is now involved and let us see where it goes.
Now the car gets it vibrations...seems like pent up with anger and ready to go.
Driver School Candidate
Joined: Dec 2005
Posts: 6
Likes: 0
From: IL
Bad motor mount and/or bad idle control valve would cause a rough idle whether in 'D' or 'N.'
This problem only occurs (in most cases, anyway) when in 'D' -- it does not occur in 'N.' In fact, it completely goes away when in 'N.' This leads me to believe it may be transmission related rather than engine related, although it could have something to do with the engine under certain engine loads....
I may be wrong on this, but I doubt it.
This problem only occurs (in most cases, anyway) when in 'D' -- it does not occur in 'N.' In fact, it completely goes away when in 'N.' This leads me to believe it may be transmission related rather than engine related, although it could have something to do with the engine under certain engine loads....
I may be wrong on this, but I doubt it.
Last edited by Pogophil; Feb 17, 2006 at 08:00 PM.
CL Community Team
Joined: Apr 2004
Posts: 17,338
Likes: 213
From: Miami, Florida
Originally Posted by Pogophil
Bad motor mount and/or bad idle control valve would cause a rough idle whether in 'D' or 'N.'
This problem only occurs (in most cases, anyway) when in 'D' -- it does not occur in 'N.' In fact, it completely goes away when in 'N.' This leads me to believe it may be transmission related rather than engine related, although it could have something to do with the engine under certain engine loads....
I may be wrong on this, but I doubt it.
This problem only occurs (in most cases, anyway) when in 'D' -- it does not occur in 'N.' In fact, it completely goes away when in 'N.' This leads me to believe it may be transmission related rather than engine related, although it could have something to do with the engine under certain engine loads....
I may be wrong on this, but I doubt it.
However, I just finished my second drain and fill on Thursday night with my last one on January 23rd and one more to go and the RX runs smoother on the road and at the track. I hear the shifts but cannot feel them and the vibrations are not as much. My dad took a drive tonight and he had driven it down here in December and could definitely notice the decreased vibration.
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Driver School Candidate
Joined: Dec 2005
Posts: 6
Likes: 0
From: IL
Originally Posted by Lexmex
Probably one of us should see after an ATF drain & fill or flush whether we notice anything. I have to exclude myself given my modifications and I notice vibrations.
However, I just finished my second drain and fill on Thursday night with my last one on January 23rd and one more to go and the RX runs smoother on the road and at the track. I hear the shifts but cannot feel them and the vibrations are not as much. My dad took a drive tonight and he had driven it down here in December and could definitely notice the decreased vibration.
However, I just finished my second drain and fill on Thursday night with my last one on January 23rd and one more to go and the RX runs smoother on the road and at the track. I hear the shifts but cannot feel them and the vibrations are not as much. My dad took a drive tonight and he had driven it down here in December and could definitely notice the decreased vibration.
Rookie
Joined: Jun 2005
Posts: 98
Likes: 0
From: VA
Originally Posted by chikoo
Still pushing with Lexus.....dealer wrote on work sheet -"unable to resolve issue- no known resolutions"
wtf am I supposed to do now?
wtf am I supposed to do now?
thats basiclly what i got and now my lex is out of warranty.
Rookie
Joined: Mar 2002
Posts: 95
Likes: 0
From: New York
Any update to this issues? This is what my mechanic did to test the noise. He had me in the car in "D" and step on brake, with a jack, he slowly lift the car and you can hear the humming noise go away when the car is jack up a little. What does this mean? Is it the engine mount or not? I'm lost, my car now has 110,000 miles and I'm not sure if I care anymore but i thought i will give u guys the results of my mechanics test.