never touched the screw itself but i did take the pressure actutor off as this was leaking fuel or what i thought was leaking fuel took it off and checked the Orings as was told these can perish.maybe i have damaged the metering head but i have just bought another with new pressure actuator so hopefully this may solve problem
stu you dont have the part number for these O rings do you.as the twat at ford just said you could only get them id i bought the actuator thing