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Juddering and knocking sound on my two year old Ford S Max

I just bought a second hand Ford S Max 1.8 diesel. Forgetting to put my foot on the clutch when I started the car up, I turned the key only to be met with an alarming and persistent judder of the whole car, accompanied by a loud knocking noise. I quickly turned the ignition off and started again with my foot on the clutch and the car started perfectly normally. Can anyone explain what happened and what I should do about it ?

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  • barbara424 Mar 07, 2009

    Sorry Josh1111, I can't tell you much more I'm afraid except the car rocked violently and noisily from side to side when I attempted to start the engine. I haven't a clue if the car has a knock sensor.

  • josh1111 May 11, 2010

    is there a knock sensor on this vehicle , not fimilar with deisel. it is intermitten so it has to be a sensor, if you explained it properly

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Did you use the glowplugs? before starting they may be bad.

Posted on Mar 07, 2009

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