Air leak help
I have an 03 mk1 focus rs and it has an air leak we cannot find we changed actuator and recirc dump valve for upgraded on but it still has a leak somewhere it sounds like I have vent to air dv when I let off can anybody help me please :-((((

 

Check the back of the inlet manifold, there's a couple of blanks on spare outlets...
Maybe leaking around that area...

 

Thanks tried that and even fitted proper blanks on it

 

one way valve hose mate, common on these

 

Thanks for replying I'm all new to the focus rs scene so could you tell me where to find this pipe your talking about please thanks