Fluctuating/Uneven Idle
Thread Starter
Lead Lap
Joined: Feb 2016
Posts: 410
Likes: 23
From: Houston, TX
Fluctuating/Uneven Idle
Hey guys... I've been noticing that my 15 RCF idles a bit weird. Regardless if AC is on or not, the idle seems to always be fluctuating a couple hundred rpms - almost barely noticable. Usually 500-700rpm back and forth. Doesn't really bother me but I wonder if it's just my car or if all the RCF has the same issue and if it was a sign of a bigger issue.
Has anyone noticed anything? Doesn't matter which mode I'm in either. Of course it's only noticeable when there is the actual needle stick on the RPM gauge (eco mode and the gauge with the yellow doesn't show well).
I can upload a video tomorrow if needed.
Has anyone noticed anything? Doesn't matter which mode I'm in either. Of course it's only noticeable when there is the actual needle stick on the RPM gauge (eco mode and the gauge with the yellow doesn't show well).
I can upload a video tomorrow if needed.
Lexus Champion
Joined: Oct 2015
Posts: 2,424
Likes: 192
From: CA
a 50-75 rpm fluctuation is normal for most cars.
the thing is with analog gauges you are less likely to notice it as the gauge is updated instantly being directly connected to the sensor.
with these new LCD screen dash clusters it is quite more noticeable because there is a slight delay between the sensor and the screen reporting it.
if it was 200rpm I would say that is an issue if the motor is at operating temps (not unrealistic if the motor is cold).
but 50-75rpm is normal.
the thing is with analog gauges you are less likely to notice it as the gauge is updated instantly being directly connected to the sensor.
with these new LCD screen dash clusters it is quite more noticeable because there is a slight delay between the sensor and the screen reporting it.
if it was 200rpm I would say that is an issue if the motor is at operating temps (not unrealistic if the motor is cold).
but 50-75rpm is normal.
Thread Starter
Lead Lap
Joined: Feb 2016
Posts: 410
Likes: 23
From: Houston, TX
Has anyone have any issues with the car shaking during cold start? You could actually feel it in the cabin.
Should I get this checked out? It's been like this for as long as I remember but never had any issues so I didn't think anything of it.
Should I get this checked out? It's been like this for as long as I remember but never had any issues so I didn't think anything of it.
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