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Old 11 Jul 2011, 10:01 pm
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Default Why do I have a rough idle on my 97 Honda Accord?

Okay so I just replaced the head gasket, had the throttle body cleaned, replaced the battery and the the alternator and starter motor is fine, and also the idle and timing tweaked a bit but yet the idle is still rough and low when I'm in drive. Also, sometimes when I turn the fan on whether it be cold or warm the idle gets a tiny bit better but not much. Does anybody have any idea on what it could be????















Also, no check engine light is on.
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Old 11 Jul 2011, 10:31 pm
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Old 11 Jul 2011, 10:46 pm
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What you don't mention is the check engine light being on. By all means clean the throttle body, but also clean the EGR valve and EGR passages. There are few things that can cause rough idle without setting the check engine light, and EGR valve leakage is at the top of the list.
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