Question about 1993 Honda Civic 4 Door

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93 honda civc idle control

I have a 93 honda civc and it idle up and down when i start up when i put it in drive it stay idle higher when i put it in park the idle is up and down. i change it but still the same

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  • lobodt Nov 14, 2008

    1993 honda civic lx sedan, auto, when in park my car revs up and down, but not in drive. Any ideas how to fix this?

  • sanjuana morris Feb 26, 2009

    turns on idle very high then slowly shuts off completely

    changed fuel filter,orgen sensor ,heater sensor,

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Have it smoke tested for a evap leak sounds like a vacum leak

Posted on Jul 20, 2012

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I;ts easy,clean the iacv ,fitv and tb.adjust the fitv--viola..purr like a cat!

Posted on Feb 21, 2009

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Fast idle thermo valve located by the throtle body with coolant hoses remove valve and adjust plastic washer its under a cover with 2 bolts good luck

Posted on Nov 19, 2008

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How can i adjest the fuel

Posted on Feb 27, 2009

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1 Answer

When I start the car it stays at 2000rpm for a few moments then drops down. I'll drive for a few minutes then put it in park and it revs up and down.


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1 Answer

My 89 honda accord lxi with the 2.0 won't idle correctly, it idles up and down and when you first start it up in the morning it idles about 2500 rpm or higher.


air in the IACV (idle air control valve) coolant line - air bubbles in the coolant will confuse the iacv into incorrect idle settings.....even when hot, and a fault in this unit will do the same thing, very very common fault in a honda.

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2 Answers

Will a cylinder head from a 1996 honda civc 1.5l non vtec work correctly on a 93 honda civic 1.5l non vtec


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1 Answer

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1 Answer

Honda accord 1996 v6 2.7 liter,rpm gage jump up and down


Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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