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by chiquilin on December 10th, 2007

chiquilin

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Why the rpms go up&down on my 1993 honda civic after 20 or 30 minutes of idle?

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Answers. 3 helpful answers below.

  • by chiquilin on December 27th, 2007

    chiquilin

    I have a 92 toyota paseo, and when step on the gas and hold at 2500 rpms the gage goes up&down.

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  • by chiquilin on December 20th, 2007

    chiquilin

    how to replace the trasmission on a 92 toyota paseo?

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  • by 8 Jan 2004-10 Dec 2009 on December 10th, 2007

    8 Jan 2004-10 Dec 2009

    At that point, the engine is totally heat-soaked. Most modern cars have cooling fans which draw QUITE a bit of juice. More amp draw from the alternator means more parasitic drag which will drop your idle speed until the coolant temp drops enough for the fans to disengage and allow the engine to turn easier/freer.

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