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Ford Fiesta 1.25 - Low Cylinder Pressures (all 4)

1119snorty
1119snorty
in General Ford Related Discussions

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At loss here everyone. Changed engine oil on my step sons 2006 fiesta 1.25 Duratec. Since then its lost cylinder pressure’s apparently and running very rich. Tried all the usual stuff. Throttle body, map sensor, O2 lambda sensor. Will only idle if you create a vacuum leak by pulling the pipes off fuel vapour solenoid, which does work and fuel canister also checked. With live data from a diagnostic tool fuel trim is max.  

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    Have you checked pressures with a compression tester or is that fault codes?

    Did you use an engine flush or the wrong oil?

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    An awful lot of parts changed and not much information to go on

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

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      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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