the mondeo suffers from bad coke build up in teh lower inlet manifold due to poor breather design

best thing to do is go get new gaskets for inlets, take inlets off and soak them both in degreaser or brake cleaner and clean as much as you can, while your doing it you can also send your injectors to do an ultra sonic clean which will restore the injectors anyhow

but they st also suffers with the imrc so this could be failing stopping the secondaries opening , so posisbly relocating it under the battery while everything is off as at the minute its directly above the exhaust manifold which cooks the circuit boards inside it