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Can a crank sensor cause the engine idle to fluctuate on 2004 Dodge Ram 1500 4.7L?

Yes, a faulty crank sensor on a 2004 Dodge Ram 1500 4.7L can absolutely cause fluctuating idle. The crank sensor provides the engine control module (ECM) with information about the crankshaft's position and speed. If the sensor is malfunctioning, the ECM receives inaccurate or intermittent data, leading to erratic fuel delivery and ignition timing. This directly translates to a rough idle, sometimes fluctuating wildly, or even stalling.
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