when i start my car it idols or accelerates up to 4000 rpm need help asap! thanks - Honda Civic Forum

Fuel, Oil, Cleaners & Other Maintenance Extending the life of your Civic requires the proper fuel, oil, and cleaners, along with other regularly scheduled maintenance.

when i start my car it idols or accelerates up to 4000 rpm need help asap! thanks

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Old 01-16-2007
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when i start my car it idols or accelerates up to 4000 rpm need help asap! thanks

im doing a b18 swap in my 1992 civic eg hatch ... well when i start my car it idols up to 4000 rpm ... i need help... i changed my headgasket.. i know its not my tps sensor bcause i just replaced it... and its not my throttel cable... and its not my water temp. sensor or my 02 sensor ... what else can it be thanks guys...
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Old 01-16-2007
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when its really cold out side, n u first start ur car, it shoots up to that much.....then it should die down in a min or so.....

is urs ALWAYS doing that, or just cold starts?
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Old 01-16-2007
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even if it's cold out, I don't think it should ever shoot up THAT high...
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Old 01-16-2007
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Does it shoot up there and stay there or does it fluctuate? Check your PCV and IACV.

ps it's spelled IDLE, I just had to correct that.
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Old 01-16-2007
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^^X2 (TeLLy, you're my idle.)
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Old 01-16-2007
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I want to audition for Canadian Idle. Really I would just sit there with a low hum and vibrating slightly.
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Old 01-17-2007
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Ill bet its in the IACV....check that first....just like Telly said. hahah
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Old 01-17-2007
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also, check ur brake booster......i remember when i forgot to plug back my BB from seafoaming....... my engine shot up like 4k n then idled at like 2k.... (that whole day)
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Old 01-17-2007
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i mean i use to like idel at 3000 rmpm but it would go down after like a couple minutes but we have left the car on for about like 10 min or so and it does the same thing ... if the car doesnt have enough oil can that affect it ?
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Old 01-17-2007
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its your IAC. get some throttle body cleaner and clean it.
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Old 01-25-2007
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You could've left a vacuum hose disconnected
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