Originally Posted by SafeChav
No choke on EFI mate, the ECU should adjust the fuelling and idle compensation.
Going to be a process of trial and error!
A compression test might eb worthwhile aswell, old CVH engines do tend to suffer.
Not completely self-adjustable. There is a base-setting on the CO which is the potentionmeter by the battery on the n/s wing. This is known to break internally, and the only solution is replacement, about £22 from Ford.
It is quite common, as it is next to the shock absorber turret, and can find itself suffering a lot of vibration, especially if the car is lowered / stiffened.
Check the CO, you will probably find that it is either way too high or way too low. Worth the time if it avoids you changing all the bits and pieces around it to no avail.
In relation to the airbox, there were 2 types of airbox fitted, hitachi valve (in the airbox) and the later ones like you have. You have had the wrong airbox retro-fitted. 1990 XR3i EFi MK4 Escorts had the ISCV on the inlet manifold, the XR2i normally had the ISCV fitted in the airbox. (unless anyone wants to correct me).