Hello people have an Escort Combi EZ Is 09.98/ 16V 90PS 206000km When I start all so cold it turns with a little bit higher speed which is normal! only the speed stays at approx.2000 revolutions until I have to wait longer at a crossroad and that even if it is already warm! that means driving 30 km in a piece the speed remains at 2000 revolutions, I have to wait at a crossroad as already written above the speed drops to normal! what can that be? Z And so I can exclude those are good! I’ve already changed the idle control valve! Then I’ve already disconnected the battery, didn’t bring anything! then I noticed if I give gas while I’m running the engine with open bonnet I hear a hissing as if it pulls air somewhere! is there maybe an air hose leaking? how many airlocks does the escort have, and where are the exactly? otherwise good car except the sorry rust problem what the Escort ha would be great if someone could help me further