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Why would a 93 Honda Civic idle up and down after you rev the car up?


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Wiki User
2004-10-31 00:00:58
2004-10-31 00:00:58

Check the Idle Air Control. It might have carbon deposits and need cleaning. Also do the same for the throttle body intake. It might also need cleaning.

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You might need to change the fuel filter.

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Idle on a 1985 Honda Civic is adjusted through a idle air control valve. This valve is located near the intake. Adjust the valve by either loosen or tightening it.

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If you have a Civic with the ECO switch turn it off before passing. If not, take it to the dealership you have a problem.

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The idle speed on a 1996 Honda Civic is adjusted using an IACV. The IACV, or idle air control valve, lowers and raises the idle by either being tighten or loosen.

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To adjust the idle on a 2005 Honda Civic locate the idle control valve. The IACV and is found near the intake manifold. Open the top of the valve and tighten it to lower the idle or loosen it to raise it.


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