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Mk6 1.4 Zetec Running Rich

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#1 sean.round



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  • Name: Sean
  • Ford Model: MK 6 Fiesta Zetec
  • Year: 2003
  • Location: Warwickshire

Posted 29 December 2012 - 09:25 PM

Hi Guys,

My 1.4 Fiesta Zetec is running really rich at the moment. I am lucky if I crack 31mpg round town, yet, get 40-41mpg on the motorway... I occasionally get the Engine Managment Light come on, which if you clear with a DTC reader, wont come back on for months on end. Error code seems to signify Lambda Sensor, but I was wondering if anyone else had any other suggestions before I fork out for them?


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#2 DanGersFord


    Dan The Gas Man

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  • Name: Daniel
  • Ford Model: Fiesta ST3
  • Year: 2014
  • Location: Scotland

Posted 29 December 2012 - 11:46 PM

Sounds like lambda sensor not giving correct air/fuel mixture hence why you're going through so much fuel. My brother had a similar problem and after changing the lambda sensor 3 times the garage he was taking it to noticed he had a big hole in his back box. After that was replaced it was fine

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