F23A4(ULEV)
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F23A4(ULEV)
I have a 99 Honda accord 4 cyc F23A4(ULEV) . I just recently had a P0401 code . I replace the EGR valve . Code was reset and returned . So I cleaned the plentum port (it was clogged) going to the egr valve with carb cleaner. Replaced the gasket to the plentum intake manifold and put everything back together. Started the engine and now in rev's from 1000 rpm's to 2000 rpm's constantly. Does anyone have any ideas of what might be the cause or what I need to check.
Last edited by nascargm; 04-02-2013 at 02:05 PM.
#3
Re: F23A4(ULEV)
Hello , I just recently had a P0401 code . I replace the EGR valve . Code was reset and returned . So I cleaned the plentum port going to the egr valve with carb cleaner. Replaced the gasket to the plentum intake manifold and put everything back together. Started the engine and now in rev's from 1000 rpm's to 2000 rpm's constantly. Does anyone have any ideas of what might be the cause or what I need to check.
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Re: F23A4(ULEV)
Well, I tried spraying carb cleaner around all vacuum hoses and intake manifold. Couldn't find vacuum leak. I want to say that I did clean the old gasket using the carb cleaner. I guess the only alternative is to remove intake manifold again to verify. Thanks for everyone's help. All advice is appreciated.
#7
Re: F23A4(ULEV)
Well, I tried spraying carb cleaner around all vacuum hoses and intake manifold. Couldn't find vacuum leak. I want to say that I did clean the old gasket using the carb cleaner. I guess the only alternative is to remove intake manifold again to verify. Thanks for everyone's help. All advice is appreciated.
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Re: F23A4(ULEV)
Well, I just removed the plenum intake manifold again and cleaned with fine sandpaper. Reinstalled everything and still getting the idle from 1000k to 2000k at idle. It has coded a P0505 and p0113. Any ideas?
#9
Re: F23A4(ULEV)
I'm sorry that it didn't fix it, this time inspect the vacuum hoses individually, maybe one is disconnected. Spraying carb cleaner is not always the best way, especially if you don't know where all the vacuum lines are and where the intake is.
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Re: F23A4(ULEV)
Did you diligently inspect the gasket surfaces? Take a good look at them, you should only see shiny aluminum. Use your hand to feel the surfaces as well.
I'm sorry that it didn't fix it, this time inspect the vacuum hoses individually, maybe one is disconnected. Spraying carb cleaner is not always the best way, especially if you don't know where all the vacuum lines are and where the intake is.
I'm sorry that it didn't fix it, this time inspect the vacuum hoses individually, maybe one is disconnected. Spraying carb cleaner is not always the best way, especially if you don't know where all the vacuum lines are and where the intake is.
SOLUTION : IAC (IDLE AIR CONTROL VALVE). Picked up a new one from Autozone for $165. I also found some on Ebay between $50 - $82 . But didn't want to wait 4 days to get it. Thanks again
Hope this helps someone in the future .
Last edited by nascargm; 04-05-2013 at 04:11 PM.
#11
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Re: F23A4(ULEV)
Glad to hear that you got it figured out.
Did you try cleaning your rotary air control valve (RACV) before you replaced it? A surging idle with a dirty IACV or FITV (both combined in the RACV on the F23A4) is a very common issue with Accords... However, you didn't mention that you were having any surging idle issues prior to cleaning your EGR.
There is a really good DIY in the FAQ on how to clean these valves as well as the entire intake and throttle body. The F23 isn't designed exactly the same as the engine in the DIY. but the process for cleaning everything is the same.
Did you try cleaning your rotary air control valve (RACV) before you replaced it? A surging idle with a dirty IACV or FITV (both combined in the RACV on the F23A4) is a very common issue with Accords... However, you didn't mention that you were having any surging idle issues prior to cleaning your EGR.
There is a really good DIY in the FAQ on how to clean these valves as well as the entire intake and throttle body. The F23 isn't designed exactly the same as the engine in the DIY. but the process for cleaning everything is the same.
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Re: F23A4(ULEV)
Glad to hear that you got it figured out.
Did you try cleaning your rotary air control valve (RACV) before you replaced it? A surging idle with a dirty IACV or FITV (both combined in the RACV on the F23A4) is a very common issue with Accords... However, you didn't mention that you were having any surging idle issues prior to cleaning your EGR.
There is a really good DIY in the FAQ on how to clean these valves as well as the entire intake and throttle body. The F23 isn't designed exactly the same as the engine in the DIY. but the process for cleaning everything is the same.
Did you try cleaning your rotary air control valve (RACV) before you replaced it? A surging idle with a dirty IACV or FITV (both combined in the RACV on the F23A4) is a very common issue with Accords... However, you didn't mention that you were having any surging idle issues prior to cleaning your EGR.
There is a really good DIY in the FAQ on how to clean these valves as well as the entire intake and throttle body. The F23 isn't designed exactly the same as the engine in the DIY. but the process for cleaning everything is the same.
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