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  #1 (permalink)  
Old 20 Apr 2016, 04:49 am
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Default RPM moving

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 ?
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Last edited by Pippov; 20 Apr 2016 at 05:23 am.
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Old 20 Apr 2016, 05:10 am
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Default Re: RPM moving



from 0,44 sec you see the gap
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CHRYSLER VOYAGER 2.5 CRD 2003

Last edited by Pippov; 20 Apr 2016 at 05:57 am.
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Old 20 Apr 2016, 07:14 am
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Default Re: RPM moving

Do you have air conditioning on? It also comes on when you have defrost on.
If the airconditioner cycles, it impacts the engine RPM.
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Old 20 Apr 2016, 07:22 am
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Default Re: RPM moving

No A/C and No defrost
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PT CRUISER 2L 2000 STARTECH
PT CRUISER 2,4L GT 2004
CHRYSLER VOYAGER 3.3 1993
CHRYSLER VOYAGER 3.8 AWD 1997
CHRYSLER VOYAGER 2.5 CRD 2003

Last edited by Pippov; 20 Apr 2016 at 07:25 am.
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Old 20 Apr 2016, 03:25 pm
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Default Re: RPM moving

I'd be looking for a vacuum leak.
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Old 21 Apr 2016, 09:49 am
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Default Re: RPM moving

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.
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Old 21 Apr 2016, 09:52 am
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Default Re: RPM moving

Time to clean intake system parts. IAC would be my first choice to examine and clean.
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Old 21 Apr 2016, 10:00 am
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Default Re: RPM moving

Quote:
Originally Posted by 2step View Post
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 .
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CHRYSLER VOYAGER 3.3 1993
CHRYSLER VOYAGER 3.8 AWD 1997
CHRYSLER VOYAGER 2.5 CRD 2003
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Old 21 Apr 2016, 10:02 am
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Default Re: RPM moving

Quote:
Originally Posted by NitroPT View Post
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
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CHRYSLER VOYAGER 3.3 1993
CHRYSLER VOYAGER 3.8 AWD 1997
CHRYSLER VOYAGER 2.5 CRD 2003
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Old 21 Apr 2016, 10:14 am
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Default Re: RPM moving

Quote:
Originally Posted by Pippov View Post
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
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