Did this get sorted please? Mine is now doing exactly the same, its a 1996 escort 1800 Si.
Over the past year I have changed plugs, leads, coil pack, EGR valve, fuel filter, PCV valve and hoses. The only sensors I have not changed are for the cam and crank. It has had two trips to and engine tuner to sort a lean error code, which turned out to be the EGR, and PCV were knackered. The DPFE sensor was changed due to a poor rev drop issue, which I did not like the feel of when driving.
During the second trip to the tuners this fault was discovered, and I did not know about it as I do not usually take the car that high in the revs. The fuel pressure was checked and deemed to be ok, and so were the hydrocarbons (in the emissions?). The tuner suggested may be the injectors. It had got him stumped.
So any help would be appreciated, as it is my daily driver. I have had the car from new, So I am attached to it.
Thanks.