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Old 10-23-2009, 10:29 AM   #1
techboi91
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Default 2000 honda accord ex idle problem

hello i have a 2000 honda accord ex and for some reason, its idling very low. at first the check engine light came on and when i got it check it was a p0505 error which means idle malfunction but a couple days later it went off now when i start it it will idle real low or sometimes when i start it will just shut off but if i rev it and warm it up it will start to work fine one day in the morning it started up fine but the next day it start then shut off like i said i got to rev it up to make it idle right does my iacv needs to be clean or repalce and i also heard that i might have to adjust the throttle, could that be it
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Old 10-23-2009, 11:50 PM   #2
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Default Re: 2000 honda accord ex idle problem

P0505 idle air control malfunction...yeah, you will need to replace the idle air control valve.
very common on 98-02 high mileage accords, both 4 cylinders and v6's. more common on the v6's...
it will eventually get worst and set a permanent dtc

Last edited by PilotOnDubs; 10-24-2009 at 12:03 AM.
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Old 10-11-2010, 09:10 AM   #3
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Default Re: 2000 honda accord ex idle problem

Just replaced mine and still the same idleing problum is there an idle air control sensor that i need to replace as well?
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Old 10-11-2010, 02:38 PM   #4
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Default Re: 2000 honda accord ex idle problem

http://tinypic.com/r/adn6nd/7

CEL reads P0505
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Old 10-11-2010, 03:10 PM   #5
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Default Re: 2000 honda accord ex idle problem

1. Did you remove the throttle body spacer you had on? If not, remove it.

http://www.honda-tech.com/showthread.php?t=1226470

2. When you replaced the IAC did you put on a new o-ring? Everything plugged back in correctly? Double-check it.

3. Disconnect battery.

4. Do idle learn procedure: Start engine with all accessories off and let idle for 10 minutes.
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Old 10-11-2010, 03:14 PM   #6
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Default Re: 2000 honda accord ex idle problem

The throttle body spacer is still on but the problum is that the factory oem one broke as i was taking it off and i am not sure where to purchace this..
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Old 10-11-2010, 03:26 PM   #7
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Default Re: 2000 honda accord ex idle problem

Go to the dealer and get it along with a new gasket.
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Old 10-11-2010, 03:29 PM   #8
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Default Re: 2000 honda accord ex idle problem

Okay so its number 5, 6, and 8 that i need to get correct?
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Old 10-11-2010, 03:37 PM   #9
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Default Re: 2000 honda accord ex idle problem

Yes. Also, disconnect battery first before performing the work. Good luck.
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Old 10-11-2010, 06:20 PM   #10
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Default Re: 2000 honda accord ex idle problem

Thanks i am really going to need it this is horrible not being able to drive my car!
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Old 10-18-2010, 09:02 PM   #11
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Default Re: 2000 honda accord ex idle problem

sounds like a vaccuum leak.

and guys, cant you just clean out the iacv? they are kind of spendy to just replace with no dianostic check first, mine was doing the same thing, different year, but i just took it off, soaked the insides with carb cleaner and let it sit for like an hour and then sprayed it out again and then repeated that process a few times. Put it back on and no issues. carb just builds up in that valve if i'm not mistaken its not really neccsary to replace it unless the electronic portion of it isnt working proper.
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Old 10-19-2010, 03:24 PM   #12
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Default Re: 2000 honda accord ex idle problem

Quote:
Originally Posted by quickster View Post
sounds like a vaccuum leak.

and guys, cant you just clean out the iacv? they are kind of spendy to just replace with no dianostic check first, mine was doing the same thing, different year, but i just took it off, soaked the insides with carb cleaner and let it sit for like an hour and then sprayed it out again and then repeated that process a few times. Put it back on and no issues. carb just builds up in that valve if i'm not mistaken its not really neccsary to replace it unless the electronic portion of it isnt working proper.
I agree with quickster, had the same problem 99 v6. I took it out and used some carb cleaner, cleaned it, soaked it, wire brushed it. Put it back on in reverse, and do the idle learn procedure. It fixed my P0505. I was NOT ready to drop 200 for an IACV ... Now i have 2 more problems.. EGR (P0401) and a cat issue..
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Old 10-19-2010, 09:43 PM   #13
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Default Re: 2000 honda accord ex idle problem

check the plug on the egr, make sure its plugged in. that threw my egr once after i changed my distributor. may have to take that off and clean it too. they are a bitch to get off on my year accord, you definately may need one of those joint socket adapters along with a medium extension. i had to use a special socket for stripped bolts to get it off because the effers were on there good from all the carb build up.
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Old 09-19-2012, 10:02 AM   #14
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Default Re: 2000 honda accord ex idle problem

if you by the valve does it come with a gasket?
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Old 09-19-2012, 10:04 AM   #15
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Default Re: 2000 honda accord ex idle problem

does the local honda dealer have the gaskets and spacer that go on the throttle body in stock or something they have to order?
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1996, 2000, 2005, 98, accord, code, control, cyl, engine, honda, idle, p0505, problems, revving, shuts, valve

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