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    Ford Fiesta 1.4 Tdci 2005 hesitation under load Archived Message

    Posted by Paul Foster on November 24, 2008, 3:42 pm

    Hi all,

    Got a fiesta in that runs fine on idle but when driving under load feels lumpy and hesitates. If you put your foot down you can drive through it and there is no lack of power on the motorway.

    Two D.T.Cs listed: crank sensor out of range and brake pedal switch - disparity between A & B.

    Have checked both pedal switches which are ok. On live data the MAF signal seems to be fluctuating wildly but when I checked the sensor on my scope the signal was steady.

    The fault seems to point to a faulty MAF sensor but the difference in the live data and the actual signal points toward an ECU issue.

    Anyone any thoughts?

    Thanks in advance - Paul.

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