jumping RPMs..... only when cold.... what you think?
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Recognized HCF Member
Joined: Jun 2006
Posts: 11,203
From: Brownsburg, IN 46112
jumping RPMs..... only when cold.... what you think?
what you think?
im not sure if its a problem or isnt a problem..
it only does this when its cold. ive took 2 videos of it but the first one is kinda dark, second one i made the motor ran about 20-30seconds before the video started and has a flash light on the tach so you can see it beter....
to me its acting like the fast idle WANTS to kick out... but then kicks back up.... sometimes it does it OVER AND OVER AND OVER.... but always seems to stop after the motors ran for afew mins....
first video kinda dark... SORRY but is preaty cold startup full run time till it idles down. speed thru the first 1/3rd
http://s40.photobucket.com/albums/e2...4civicrmps.flv
2nd video.. motor ran about 30secons before video starts..... had to pull the car outta the garage...
http://s40.photobucket.com/albums/e2...=civicrpm2.flv
im not sure if its something that can be fixed or typical? i dont like it jumping like that... more anoying than anything... so if i can fix it id like to fix it
im not sure if its a problem or isnt a problem..
it only does this when its cold. ive took 2 videos of it but the first one is kinda dark, second one i made the motor ran about 20-30seconds before the video started and has a flash light on the tach so you can see it beter....
to me its acting like the fast idle WANTS to kick out... but then kicks back up.... sometimes it does it OVER AND OVER AND OVER.... but always seems to stop after the motors ran for afew mins....
first video kinda dark... SORRY but is preaty cold startup full run time till it idles down. speed thru the first 1/3rd
http://s40.photobucket.com/albums/e2...4civicrmps.flv
2nd video.. motor ran about 30secons before video starts..... had to pull the car outta the garage...
http://s40.photobucket.com/albums/e2...=civicrpm2.flv
im not sure if its something that can be fixed or typical? i dont like it jumping like that... more anoying than anything... so if i can fix it id like to fix it
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Joined: Sep 2007
Posts: 9,453
From: Houston, Texas
RE: jumping RPMs..... only when cold.... what you think?
I guess I will throw a couple of obvious ideas out there for you:
1) A faulty Fast Idle Valve (see picture).
2) A dirty or faulty EACV.
[IMG]local://upfiles/25538/0733EC2C762D4A76B056912A113B7BC2.jpg[/IMG]
1) A faulty Fast Idle Valve (see picture).
2) A dirty or faulty EACV.
[IMG]local://upfiles/25538/0733EC2C762D4A76B056912A113B7BC2.jpg[/IMG]
Thread Starter
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Recognized HCF Member
Joined: Jun 2006
Posts: 11,203
From: Brownsburg, IN 46112
RE: jumping RPMs..... only when cold.... what you think?
ORIGINAL: mxs
Have you done anything to try and diagnose the problem? there are several possible causes of "surging idle"
Have you done anything to try and diagnose the problem? there are several possible causes of "surging idle"
HCF Member
Joined: Jul 2005
Posts: 7,994
From: Rochester, NY
RE: jumping RPMs..... only when cold.... what you think?
ORIGINAL: RonJ
I guess I will throw a couple of obvious ideas out there for you:
1) A faulty Fast Idle Valve (see picture).
2) A dirty or faulty EACV.
I guess I will throw a couple of obvious ideas out there for you:
1) A faulty Fast Idle Valve (see picture).
2) A dirty or faulty EACV.
Joined: Nov 2007
Posts: 211
From:
RE: jumping RPMs..... only when cold.... what you think?
ORIGINAL: Stocker
is it the rpms and the engine fluctuating or just the needle in the dash, and the engine doesnt fluctuate?
is it the rpms and the engine fluctuating or just the needle in the dash, and the engine doesnt fluctuate?
There's a VIDEO ----- It's the engine as well.
Thread Starter
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Recognized HCF Member
Joined: Jun 2006
Posts: 11,203
From: Brownsburg, IN 46112
RE: jumping RPMs..... only when cold.... what you think?
ORIGINAL: mxs
Could also be that your idle just needs to be adjusted. Or air bubbles in your coolant.
ORIGINAL: RonJ
I guess I will throw a couple of obvious ideas out there for you:
1) A faulty Fast Idle Valve (see picture).
2) A dirty or faulty EACV.
I guess I will throw a couple of obvious ideas out there for you:
1) A faulty Fast Idle Valve (see picture).
2) A dirty or faulty EACV.
Recognized HCF Member
Joined: Sep 2007
Posts: 9,453
From: Houston, Texas
RE: jumping RPMs..... only when cold.... what you think?
ORIGINAL: mxs
Could also be that your idle just needs to be adjusted. Or air bubbles in your coolant.
Could also be that your idle just needs to be adjusted. Or air bubbles in your coolant.
HCF Member
Joined: Jul 2005
Posts: 7,994
From: Rochester, NY
RE: jumping RPMs..... only when cold.... what you think?
Coolant flows through the valve, and a sensor uses the engine temperature to determine the idle speed. If there is a giant air bubble in the valve and no coolant is getting in there, it doesn't know the actual engine temperature, and it gets confused