Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

00 Civic ex won't rev over 4k rpm and has rough idle

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Old Sep 23, 2010 | 03:23 PM
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Default 00 Civic ex won't rev over 4k rpm and has rough idle

Hey guys.

Car wont rev over 4k Rpm. Also, the idle is very rough, especially at cold starts. It sounds as if its about to bog out but as soon as you give it some gas it picks up, and it idles fine after warming up a bit.

Last edited by Kev2010; Apr 9, 2011 at 06:26 PM.
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Old Sep 23, 2010 | 03:50 PM
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Default Re: Car wont rev over 4k rpm/rough idle

Start here -- Plugs, wires, cap, rotor and set ignition timing. Has the timing belt been replaced?

Any CEL codes?
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Old Sep 23, 2010 | 04:13 PM
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Default Re: 00 Civic ex won't rev over 4k rpm and has rough idle

During the tune up replace the air filter as well. You should also clean your IAC Valve with carb/choke cleaner..
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Old Sep 23, 2010 | 04:49 PM
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Default Re: Car wont rev over 4k rpm/rough idle

Originally Posted by RonJ@HT
Start here -- Plugs, wires, cap, rotor and set ignition timing. Has the timing belt been replaced?

Any CEL codes?
I will be replacing-

plugs,wires,cap,rotor,intake filter,cabin filter, engine oil, engine oil filter, and tranny fluid. I know that some of that stuff doesn't need to get replaced but I am going to do it as precaution.

While I am doing this I am going to clean the FITV and IACV. Hope fully my friend is going to stop by and do a compression test for me just to see whats up.

I emailed the owner and he said he changed the timing belt around 70k miles so I don't think that is a problem. The bad thing he told me is that the gas may be bad (after sitting for a year) so I am going to try to drain that.

No CEL codes. I think it may just be the fitv or iacv that's causing the rough idle and the spark plugs are probably the cause of the limited rpm.


Thanks.
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Old Sep 23, 2010 | 04:51 PM
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Default Re: 00 Civic ex won't rev over 4k rpm and has rough idle

I also think I am going to replace my throttle body/gasket? Should I order form my local honda dealer or should I look online?
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Old Sep 26, 2010 | 02:47 PM
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Default Re: 00 Civic ex won't rev over 4k rpm and has rough idle

Originally Posted by Kev2010
I also think I am going to replace my throttle body/gasket? Should I order form my local honda dealer or should I look online?
www.bkhondaparts.com
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Old Oct 5, 2010 | 04:49 PM
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Default Re: 00 Civic ex won't rev over 4k rpm and has rough idle

I'm no expert, but my car does this when there is a lot of moisture outside and my diagnosis was the ECU going into "limp mode." Still haven't resolved my problems either...
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