Join Date: Jun 2006
Location: Eastern ON Canada
Car: 07 OBW 2.5i D-4AT
Feedback Score: 5 reviews
speedfreak_josh reported that the engine runs smoothly when using the starter spray. shouldn't this pretty well eliminate the ignition and engine mechanicals as the cause?
The fuel pump cycling seems correct, although this does not ensure that the fuel line pressure or delivery rate is correct. Line pressure is mechanically, not electrically, regulated.
A blockage in the fuel line, including the filter, is possible, but I would think less likely given the symptoms. A clogged fuel filter would not be 100% unless it is really bad (in which case the last time the car was used it should have been showing signs) so there would be some fuel delivery -- at the least at the outset, so the engine might start and then sputter to a stall.
Clogged injectors could also be a problem, but I doubt all six would be affected equally all at the same time. Consequently, I would expect very rough idle or at least some sign of ignition, even if the engine does not continue to run. But it sounds as if there isn't even any sputtering attempts at ignition.
Assuming that fuel is getting to the fuel rail at the right pressure, there is still the question of whether the injectors are functioning. They are electronically controlled by the ECM. It might be possible to measure the voltage to the injectors while cranking the engine to see if they are getting the voltages necessary for the release of fuel into the intake manifold.