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A high idle in a Chevrolet Alero can be caused by several factors, including a malfunctioning idle air control (IAC) valve, a vacuum leak in the intake system, or a faulty throttle position sensor (TPS). Additionally, issues with the mass airflow sensor (MAF) or a dirty or clogged air filter can also lead to an elevated idle. It's important to diagnose the specific cause to ensure proper functioning and performance of the vehicle.
What else can I help you with?
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Vacuum leek
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http://www.greatautohelp.com/oldsanswers/2000-alero-theft.html
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did you find a solution yet
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The cause of high engine idle and surges in the 1989 Corvette is due to..Read More
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