Idles a little rough when not warmed up, normal?
#1
Idles a little rough when not warmed up, normal?
Hello,
I recently bought a new 2008 RDX Tech, but noticed especially first start of the day in the morning after starting the car, when left in park the car idles a bit rough (but maybe that is normal, as thereafter all is fine).
I recently bought a new 2008 RDX Tech, but noticed especially first start of the day in the morning after starting the car, when left in park the car idles a bit rough (but maybe that is normal, as thereafter all is fine).
#2
Carbon Bronze Pearl 2008
I noticed similar, but rather in drive and stopped at a red light shortly after only just starting the RDX. I think it's normal. I mean, it's not significant but slightly noticable. A 4-cylinder will never idea as smooth as a V6. I wouldn't worry about it unless you feel the engine is not responding properly.
#3
Burning Brakes
Yes, an in-line 4 will idle a little rough, especially in cold weather. I would also imagine the turbo would have some effect too in cold weather. It's just the nature of the beast.
#5
Senior Moderator
All cars do this but noticeable more on 4 bangers (especially if you are coming from a non 4 cyl vehicle)
ECU needs to warm the car up fast and this is how it does it. Idle rpm on a cold start should sit just at or bit less then 1500 RPM, once warm should be at 700 rpm.
ECU needs to warm the car up fast and this is how it does it. Idle rpm on a cold start should sit just at or bit less then 1500 RPM, once warm should be at 700 rpm.
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