Originally Posted by
GVK.
You only disconnect the imv & injectors to test the fuel pump and injectors as it should give maximum pressure, if any injectors are leaking off excessively you will lose fuel pressure during the test I have described above.
I have a focus 1.8 tdci (with delphi system) that won't start. It's a 53 plate mk1 2004 model. Diagnosis has revealed 110 Bar (read via diagnostic from fuel pressure sensor) and it's the same 110 Bar when the IMV is disconnected. Would the pump give this much pressure if knackered or is it possible the pump is good but one of the injectors has gone and is leaking off all the pressure. What pressure would you expect from a knackered pump if it's 250 Bar minimum to start the engine?