Just fitted the above to my 1988 escort rst and have a problem the car starts fine for a few seconds with aid of the throttle but when you let it idle the car stalls.

It must be something basic so has anyone come across this problem before? I did not pipe in the one way valve which goes to the left of the inlet manifold on the original system (as i broke it by mistake), is this to be included in the new breather or would that not make a difference? Im confident ive connected all the pipes the correct way but any pics would also be a help.

I should add that the car started perfectly before uggrading to the aftermarket breather.