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2014 1.5 mk7.5 engine stutters in 4th and 5th

srdz
srdz
in Ford Fiesta Club

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My fez has started to stutter in 4th and 5th gear. It feels like loss of power, injector down or similar. No codes from diagnostics. Only started after gearbox change. I used a 2014 start stop gearbox although my car doesn't have it. So nothing to plug into the bottom electrical socket. Gearbox is smooth. Could I have knocked something off, trapped something, or forgotten to attach something during fitting?

Any help would be great as it's driving me round the bend!

  • Quote


    depending on the engine you have, i know that the 1.0eco boosts' gearbox have a taller ratio in 4th and 5th than the 1.25l petrol for instance, worth checking the drive ratios

  • Quote
    • Author

    Mine is a 1.5. The gearbox came out of a 1.0 I believe.

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