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most common problem causing a surge while a car idles is the MAF-Mass Air Flow sensor is contaminated. typically this will throw a code (check engine light aka MIL)

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1994 Buick Roadmaster rough idle stalling?

A rough idle and stalling in a 1994 Buick Roadmaster can be caused by several issues, such as a dirty or failing idle air control valve, a malfunctioning mass airflow sensor, or vacuum leaks in the intake system. Additionally, check the fuel system for clogged fuel filters or failing injectors. Ignition system problems, such as worn spark plugs or faulty ignition coils, can also contribute to these symptoms. Conducting a thorough diagnostic can help pinpoint the exact cause.


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