RPM moving

[Pippov]

When I got to the stop , I find that RPM vary widely.
It s the same when the engine is cold or warm.
they oscillate between 690 and 760 rpm , creating small accouts .
Is there a way to set the slowing down? Or it can come from elsewhere ?

[Pippov]

from 0,44 sec you see the gap

[quicksilverdon]

Do you have air conditioning on? It also comes on when you have defrost on.
If the airconditioner cycles, it impacts the engine RPM.

[Pippov]

No A/C and No defrost

[chuzz]

I'd be looking for a vacuum leak.

[2step]

I do see the one little drop in RPM at 44sec but the rest of the small changes of 10 RPM or less seems normal to me. A vac leak would send the RPM up fairly high and I don't see that. What I do see is a short drag on the engine like maybe the alternator or other accessory momentarily shifting modes. Even worn torque strut bushings could cause that. I'm not sure if I could actually hear the engine slow in the video.

At this point, I wouldn't worry too much about it unless it is a chronic problem all the time, cold engine right after start up, warm engine waiting at a stop light, in gear, in neutral, etc.

[NitroPT]

Time to clean intake system parts. IAC would be my first choice to examine and clean.

[Pippov]

Originally Posted by 2step

I do see the one little drop in RPM at 44sec but the rest of the small changes of 10 RPM or less seems normal to me. A vac leak would send the RPM up fairly high and I don't see that. What I do see is a short drag on the engine like maybe the alternator or other accessory momentarily shifting modes. Even worn torque strut bushings could cause that. I'm not sure if I could actually hear the engine slow in the video.

At this point, I wouldn't worry too much about it unless it is a chronic problem all the time, cold engine right after start up, warm engine waiting at a stop light, in gear, in neutral, etc.

It s a chronic problem, it comes in all different time when the car doesn't run, cold engine warm engine there is no difference .

[Pippov]

Originally Posted by NitroPT

Time to clean intake system parts. IAC would be my first choice to examine and clean.

You talking Air intake system parts ?
My Air intake system is new and it s the same as before I change it

[NitroPT]

Originally Posted by Pippov

You talking Air intake system parts ?
My Air intake system is new and it s the same as before I change it

I recommend to Examine the parts anyway.


Mostly check and clean yourr IAC or specifically called IACV. Idle Air Control Valve