Question about 1999 Ford Expedition

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Runs rough when driving fine at idle

Runs rough when driving fine at idle like it is choking out

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Clean MAF sensor with MAF sesnor cleaner or carb cleaner. spray the tiny wires inside the sensor. They get coated with varnish. careful, they are glass coated. MAF is in air cleaner intake usually and has a wiring connector.
It reads amount of air flowing through air cleaner so computer knows how much fuel to allow through injeftors.

Also, go to Autozone and have them test for codes if your check engine light is on. free service.

Posted on Dec 12, 2009

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Posted on Jan 02, 2017

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