Honda Accord (1990 - 2002) Includes 1997 - 1999 Acura CL

Car Idles Rpm Up and Down

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Old Apr 28, 2006 | 05:41 AM
  #1  
standbackimapro's Avatar
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From: BRICKTOWN, NEW JERSEY, USA
Default Car Idles Rpm Up and Down

Usually when i start my car in the morning or after it hasnt been drivin in a while

My idle usually goes up and down id say it goes up to about 2k then down to like 800 then up and down for about 10 minutes

I replaced the air intake temperature sensor
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Old Apr 28, 2006 | 07:14 AM
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Ped_Xing's Avatar
 
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From: Denton, tx, usa
Default Re: Car Idles Rpm Up and Down (standbackimapro)

When my 94 lx did this the shop told me it was the throttle position sensor.

You might want to let everyone know what kind of accord you're having trouble with.
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Old Apr 28, 2006 | 07:27 AM
  #3  
Ross 2.0's Avatar
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From: Richmond, Va
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90% of the time when this happens the Idle Air Control valve has taken a dump on you. Try taking if off and give it a good cleaning with throttle body cleaner.
It's amusing to see someone with a SN like yours asking a question
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Old Apr 28, 2006 | 08:32 AM
  #4  
accordcg3's Avatar
 
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From: BOSTON, MA, USA
Default Re: Car Idles Rpm Up and Down (standbackimapro)

Yea thats def. the IAC very common with early and mid 90's hondas. Take it off and give it a nice cleaning like moogocow3 said and if it still does it cough up the loot to get a new one. There fairly cheap.
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Old Apr 28, 2006 | 12:20 PM
  #5  
lowered94accord's Avatar
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From: Gray, TN, US
Default Re: Car Idles Rpm Up and Down (accordcg3)

clean it and if that doesnt help then you probably have a leak and you can either buy a new one or you can find the leak and put a patch on it like i did
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Old Apr 28, 2006 | 01:25 PM
  #6  
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From: COUNTY JAIL, usa
Default Re: Car Idles Rpm Up and Down (standbackimapro)

why don't you start with year and model..

it will make helping you a lot simpler
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Old Apr 28, 2006 | 04:43 PM
  #7  
gianinline's Avatar
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From: Pompano Beach, FL, USA
Default Re: Car Idles Rpm Up and Down (Ped_Xing)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ped_Xing &raquo;</TD></TR><TR><TD CLASS="quote">
You might want to let everyone know what kind of accord you're having trouble with.</TD></TR></TABLE>

Maybe that's because he has a nissan photo in his avatar......
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Old Apr 29, 2006 | 05:22 PM
  #8  
standbackimapro's Avatar
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Sorry its a 1990 accord dx

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Old Apr 29, 2006 | 05:36 PM
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From: COUNTY JAIL, usa
Default Re: (standbackimapro)

make sure there are no vacc leaks, chk the idle adjuster screw make sure it has not backed almost all the way out, remove the top cover of the fast idle valve and screw in the inner valve,,
try these and post results..
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Old Apr 29, 2006 | 06:23 PM
  #10  
hondadude's Avatar
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From: Fayettenam, Ar, US
Default Re: Car Idles Rpm Up and Down (standbackimapro)

Check the coolant level first, be sure the block is burped thru the 12mm bleed screw at the T-stat housing
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