Hurrah, another 2.8! Have you checked the plastic corrugated breather pipes that run around the top of the engine? They get brittle with age, crack and let air in which would give a weak mixture which might cause a stutter? Air mass meter might be getting a bit past it which might cause similar? If it hasn't been serviced recently then make sure the air filter and plugs are swapped, best to make sure the basics are right before searching for other problems!
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PF late '97 D2 2.8 Aluminium Silver. Solar roof, Full Heated Leather, Double Glazing, 17" wheels, Sports Steering Wheel, Cruise, Blinds, Bose sound.
Fiat Tipo diseasel econobox with all the buttons and none of the soul that now does all the heavy lifting.
Ford Capri Laser: noisy, slow, thirsty, bouncy, no buttons but it always sounds like it’s REALLY trying and I can’t help but chuckle when it parps and boings along. And people of a certain age stare at it with a wistful look in their eyes that clearly says…I had one of them. And I sold it because of the kids 
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