Why would a car idle too high?

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โˆ™ 2005-03-19 13:12:46

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A vacuume leak at the intake manifold or vacumme hose can cause a high idle. On carbuerated vehicles the idle adjustment screw may be set to high. On fuel injected vehicles, the Idle Air Control(IAC) circuit or valve may be faulty. On newer vehicles you may be able to get a trouble code to help pinpoint the problem. Chris

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โˆ™ 2005-03-19 13:12:46
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Q: Why would a car idle too high?
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What happenes if the Idle speed in a car is too high?

the engine runs at a faster rate than when the idle speed is lower.

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The idle speed is factory pre-set, and no adjustment is available. If the idle is too high, or too low, you will be having other problems that will affect the idle. In cooler temperatures, it will take the engine longer to come out of fast idle, as the engine warms up to operating temp. If the idle is too high/stays at a higher than normal idle, then take the thing to get it repaired. Running a car in gear(automatic transmission) with a higher than normal idle, can damage the transmission.

Why does the car turns off if you are not pushing on the gas?

Check your idle, your idle might be too low so it is stalling your car.

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Not knowing exactly what they did my best educated guess would be that the idle is too high.

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A car can idle too low because there is a leak in the vacuum. Cracks or breaks on the vacuum hoses in the cars engine could be the cause of this.

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Posssibly the idle is too high. TAke the idle solonoid off of the throtle body and clean it.

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What would cause an automatic 95 Celica to Jerk forward when placing it in Drive?

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