View Poll Results: Is you Lexus RX350 F Sport idle rock steady?
Yes - even when I look for it hard, it cant see the needle jump
9
64.29%
No - I can see the rpm needle jump ever so slightly while at idle
5
35.71%
Voters: 14. You may not vote on this poll
2016 RX350 Engine Idling Issue
Rookie
Joined: Jan 2019
Posts: 99
Likes: 29
From: MA
I do not have an F-sport so this is a general comment. Whenever I hookup an OBD2 reader to any of my cars and look at rpm at idle there are constant 50-150rpm fluctuations. On some vehicles this was enough to to see small fluctuations in the tachometer but in most I believe the tachometer isn't sensitive enough to detect these small changes in RPM. If the car is otherwise performing normally in every other way I would not worry about it - my guess is the digital tach is more sensitive than the analog tach.
Thread Starter
Rookie
Joined: Nov 2019
Posts: 27
Likes: 2
From: Victoria
So whatever fix they applied seems to have worked. It doesnt do the 150 rpm jumps anymore. Since I picked up the car on a saturday, the service wasnt open so I dont exactly have the documentation of what they did but on the phone call they said they cleaned the throttle body and reset the ECU. May be tell your service guys to do that.
Pit Crew
Joined: Mar 2019
Posts: 131
Likes: 25
From: WA
So whatever fix they applied seems to have worked. It doesnt do the 150 rpm jumps anymore. Since I picked up the car on a saturday, the service wasnt open so I dont exactly have the documentation of what they did but on the phone call they said they cleaned the throttle body and reset the ECU. May be tell your service guys to do that.
Would you be able to share what they wrote on your service receipt?
Rookie
Joined: Sep 2010
Posts: 36
Likes: 17
From: Utah
So whatever fix they applied seems to have worked. It doesnt do the 150 rpm jumps anymore. Since I picked up the car on a saturday, the service wasnt open so I dont exactly have the documentation of what they did but on the phone call they said they cleaned the throttle body and reset the ECU. May be tell your service guys to do that.
thanks!
Pole Position
Joined: Mar 2007
Posts: 396
Likes: 40
From: Bay Area, CA
Does anyone feel the car surging? You would feel 150rpm surge or engine vibration for sure + hear it in the idle. Especially from the OP's video, the needle is jumping. If you don't hear or feel anything, my assumption is it's just the signal - clusters aren't very accurate. Monitor the situation, have it documented and if something comes up, it will be covered under warranty.
One last thing. Get your car warmed up and drive it hard, this helps clean buildup, evaporate any moisture, helps the car run smoother.
Last edited by SFFD785; Feb 12, 2020 at 09:38 PM.
Thread Starter
Rookie
Joined: Nov 2019
Posts: 27
Likes: 2
From: Victoria
Sorry i dont have the service note as of now but I will get it when my car goes in for service next week.
Pit Crew
Joined: Jun 2010
Posts: 148
Likes: 57
From: ca
Fluctuating idle
hi guys, has anyone here experienced fluctuating idle? i experienced that one morning on the way to the dealership so i recorded it but the tech couldn't find anything wrong.
is it possible to upload videos here? sorry, It's been ages since i browsed on forums
is it possible to upload videos here? sorry, It's been ages since i browsed on forums
Racer
Joined: Nov 2017
Posts: 1,939
Likes: 581
From: New York
This has been covered in detail on another thread. Do a search and you'll find it.
10th Gear
Joined: Feb 2020
Posts: 11
Likes: 2
From: NJ
Roughly idle
I picked up a brand new F Sport last weekend and I noticed that sporadically the car will lightly vibrate/idle roughly as I come to a stop at a stop sign or red light.
Could this be just bad gas? I haven’t used a full tank yet. I can’t seem to catch it on video occurring because it doesn’t happen very often. It’s almost like the car is about to run out of gas but nothing happens once I start driving.
Could this be just bad gas? I haven’t used a full tank yet. I can’t seem to catch it on video occurring because it doesn’t happen very often. It’s almost like the car is about to run out of gas but nothing happens once I start driving.
10th Gear
Joined: Feb 2020
Posts: 11
Likes: 2
From: NJ
Not sure if it’s related to my issue of the rough idle, but the check engine light and a bunch of warnings regarding traction, AWD, parking brake, etc turned on. Message on dash advised to bring to dealer.
Waiting to see what happens now. Less than 350 miles on the car.
Waiting to see what happens now. Less than 350 miles on the car.
Driver School Candidate
Joined: Jun 2021
Posts: 1
Likes: 0
From: nsw
Created a new thread for the issue since I think this may be unrelated to battery replacement as I may not have noticed it earlier. The car in question is a 2016 Lexus RX350 F Sport which I bought used with around 42k miles on the clock. The issue is that sometimes when I am simply standing at the traffic the light with transmission in D, the idle rpm is not constant and it keeps jumping by about 150 rpm or so. Even otherwise the rpm needle is never rock stable as it should be but it could be due to the fact that the rpm instrumentation is fully digital in F Sport and there are 20 notches for every 1000 rpm with each notch corresponding to about 50 rpm and therefore even slight variations will be caught. The question I want to ask my fellow Lexus mates is
1. Is your RX350 idle rock steady? Meaning when the engine is fully warmed up, can you see the rpm needle jump a little however slight (you may really have to look for it).
2. The issue with my car is idle jumping by about 150 rpm standing still and doing nothing. It was reported when my Lexus went in for service for other smaller issues (thread link: https://www.clublexus.com/forums/rx-...placement.html) and while I was able to recreate it whenever I wanted to (gentle stop to complete halt and the rpm needle will fluctuate), I can no longer recreate it. It now happens when it happens. Also attaching the video of the same happening on two separate occasions. I am using premium 98 octane gas. What do you think could be the issue here?
https://photos.app.goo.gl/igQFXMF3yzzUUygXA
https://photos.app.goo.gl/JrHDDvtwmcCTRZBY8
3. What is the technical spec for the idle rpm for this engine if you know? I tried searching but could not find anything. Usually it is specified as xxx +-xx rpm
Thanks a bunch in advance and a very happy new year!
1. Is your RX350 idle rock steady? Meaning when the engine is fully warmed up, can you see the rpm needle jump a little however slight (you may really have to look for it).
2. The issue with my car is idle jumping by about 150 rpm standing still and doing nothing. It was reported when my Lexus went in for service for other smaller issues (thread link: https://www.clublexus.com/forums/rx-...placement.html) and while I was able to recreate it whenever I wanted to (gentle stop to complete halt and the rpm needle will fluctuate), I can no longer recreate it. It now happens when it happens. Also attaching the video of the same happening on two separate occasions. I am using premium 98 octane gas. What do you think could be the issue here?
https://photos.app.goo.gl/igQFXMF3yzzUUygXA
https://photos.app.goo.gl/JrHDDvtwmcCTRZBY8
3. What is the technical spec for the idle rpm for this engine if you know? I tried searching but could not find anything. Usually it is specified as xxx +-xx rpm
Thanks a bunch in advance and a very happy new year!
