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Q: Possible causes for the idle to be in the 1100 to 1900rpm range? Thank you. on 2002 Ford Taurus

Journeyman 557e801cd4784d8ff835b38f3ce0382fce2b6648a740d3c63b0eb4abb5a716fb
The car had a dieing issue,supposedly the crank sensor.That's been replaced.The ignition module changed(so the manifold has been off-this latest issue since the manifold was off.I don't know if it's related,or something connected to the first problem.
(1) Answer
Check all vacuum hoses .test the idle air control motor.Any codes? Brake booster check valve/hose hooked up?