I had that same corduroy at a party that has the same Zetec Rocam engine of your Ford Ky the problem was the engine temperature sensor, or ECT, but I had the same problem in a Ford Currier with the same Ztec Rocam engine, and clean the flow and arrange it, so first clean and then see that in both cases the Scaner does not detect anything, because the signal is out of the It happens, the pump would have to have a minimum 3 bar for proper functioning, and the injectors apart from cleaning them deves them on occasion is not for dirt but because the embobinado is spoiled, I have changed several parties for the theme of the warming that is the corduroy of this engine.