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Mk7 Tdci 1.6 No Boost.....sometimes

S666LER
S666LER
in Ford Fiesta Club

Featured Replies

Morning

Not sure what's going on but twice now I have been going along about 1minute or so and its like there is no boost. Pushing down in the accelerator the revs wont increase but the car itself idles OK and no lights on the dash are flashing. But as soon as I turn the car off and on its fine??

Now I had filled up with different diesel between the 2 times its happened in case it was a bad batch but no change. Stripped airbox down to see if its blocked but nothing.

So now I need some advice.

  • Quote


    Possibly the mass air temp sensor ( I think that is what it is called ) on inlet pipe is playing up or blocked / dirty

  • Quote

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    • The Digestive Forum Roundup (24th May - 31st May 2026)

      Steve ·
      The Digestive Forum Roundup (24th May - 31st May 2026) We hope this email finds you well and enjoying your week. As always, our forum has been buzzing with activity, so we’ve compiled the highlights for you. Plenty of interesting discussions are taking place, especially around the Ford Focus and Fiesta models. Starting off with the Focus, many members have been discussing issues with the Emergency Call System, particularly in the Mk4 model. PLB raised concerns about persistent malfunctions, a se
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