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Focus Titanium 1.6 Diesel irregular rough running


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Hi, I wonder if any of you might be able to help with this one?

I've had a good look through the past posts and haven't seen anything that's quite the same as this.

I bought the car second hand in August of last year from my local Ford dealer and starting in October I had an engine fault develop. When accelerating in 6th from about 55/60MPH the car would sometimes hit what I'd describe as a limiter. The revs would climb steadily, and then be dramatically reduced only for them to climb again before being reduced again, this would happen continuously until I reached about 3500 RPM and it leveled out. It doesn't do this every time, but does it most often when the engine is under a small load, I.e going up a long, slight hill.

My car has been in and out of the local Ford dealer and they have been unable to recreate the fault despite me having footage of it occurring, to make it even more difficult to diagnose, it doesn't leave behind a fault code! They've updated software but that hasn't helped, have any of you got an idea of what could be happening / how I can get them for repair it? I've got another 2 years of dealer warranty so I may as well make the most of it!

Here's some footage of the fault.


Cheers, Chris

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