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Old 03-20-2011, 11:25 PM   #1
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Default hay 91 accord idles up and down

i have a 91 honda accord ex that idles up and down butwhen i take the # 21 vaccume line off it stops. can anyone tell me whats going on with my car
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Old 03-21-2011, 04:21 AM   #2
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Default Re: hay 91 accord idles up and down

When does it do it? When it's cold or running hot at nomral temp?
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Breaking the bank, maybe. Feeling like a boss, likely.
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Old 03-21-2011, 02:54 PM   #3
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Default Re: hay 91 accord idles up and down

all the time dosent matter on the temp
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Old 03-21-2011, 08:24 PM   #4
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Default Re: hay 91 accord idles up and down

tighten the idle air valvle scew up i had two different ones do the same thing and another one was the intake gasket it sounds the same
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Old 03-22-2011, 07:18 AM   #5
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Default Re: hay 91 accord idles up and down

apparently, idle surging happens with any vacuum leak.

i once had to unbolt my egr valve and had to leave it on loose; i started and ran the car - it was surging.

it just so happens that the fast idle thermal valve tends to be the most common (naturally occurring, when cold) source of a leak on hondas, though that may not be the case here.

try to find out what the source of your vacuum leak is -what is vacumm line 21 hooked up to?- and fix it.
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