2000-2007 Ford Taurus & Mercury Sable (4th Generation) • Re: Unsteady idle, no code, a lot done so far

Had the same problem with fluctuating idle , changed the alternator , fixed mine.

Same issue in 2025, a new Alternator fixed our issue! Had RPMS jumping between 650-740 at idle which was driving me NUTS! Also tried a dozen IAC valves and a purge valve!

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