Hi mate,what's a 'st' phase sensor??,do you mean the sensor inside a cosworth dist?.Buy a 1 new from a fiat dealer or get 1 off a scrapped Fiat tempra,2.0 tipo,Lancia delta int.,hf turbo,while your there also grab the idle valve,engine sensors,FPR and the dry coil,much better that the Ford oil filled 1.