Engine flaring is a common problem with the Endura engine. Ford issued Technical Service Bulletin:
from
www.honestjohn.co.uk:
Technical Service Bulletin (
TSB) 095/200 entitled 'Engine Idle Flare during Gear Changes' involves replacement of throttle position sensor (FPS) and wiring to it. Looks as though it is simply replaced and the wires splied to the existing loom.
A Ford dealer should be able to access the above
TSB and permantently fix the problem.