Mondeo V6 Duratec cutting out at speed

[cannaefixit]

My 95 Mondeo 2.5Ghia is fine around the country lanes and in town (well, it is if you ignore the terrible clutch!) but will cut out if I really toe it and sometimes at normal motorway speed. After a few seconds when the speed has dropped off, it will cut in again and run OK.
Clearly this needs sorting fast.

Any suggestions where to look first?

(I'm a reasonable 2-wheel mechanic btw - just need to find my way around this engine).

Thanks for any help you can offer.

 

[kilovolt]

Does it cut out dead (as if switched off) or does it slowly die(2-3 seconds) With perhaps some jerking?

 

[cannaefixit]

It dies slowly, misfiring.

 

[Diyisfun]

problem with my was a faulty lead.AA man couldnt diagnoise it. but that was that was when the v6 was new

 

[cannaefixit]

Thanks for responding guys but the problem was actually really simple.

(I've only just bought the car btw, as in yesterday, on ebay ).
I filled up with petrol this morning because the tank was really low and I thought it might be cr**** dregs in the tank. There was a huge sucking noise as I unscrewed the filler cap. Took it for a 40 mile burn, misfire came back, unscrewed petrol cap... you're getting the picture.

Phew!

 

[JonB]

My 2ltr year 2000 mondeo has had a sucking noise at the filler cap since I bought it new, and it doesn't cut out.

 

[Stivino]

Most cars do that when you remove the cap.