IMCHIA

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.

ssmoked

I notice it too mostly when the car is cold. Then it goes away

IMCHIA

I might have been exaggerating 500-700rpm. It's more like 500-550 RPM fluctuation.

corradoMR2

^^^ Mine does that too. I think it's normal.

mjeds

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.

IMCHIA

Thanks. Figured it might have been.

IMCHIA

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.