Hello Forumisten ! Had a persistent problem with the idle speed of my 1998 Escort with the 1.8l 16V Zetec machine. LLDZ was constantly at least 1100min, but suddenly fell down. Workshop looked at the electronics stupid and dubious…. The decisive tip came among other things from FSK : A small valve, which stores the fresh air supply into the housing of the engine block, was broken. A simple, purely mechanical Batueil to the value of about 20€…. (By the way, it sits on the front of the engine block, close to the exhaust manifold, below the thermostat housing and is hidden under a black hose. Simply plugged on.) So a FETTES THANK YOU ! Now I have a problem less…. remain only about three dozen :-/ Greetings, Marc