Well, what was being said to me by the advisors didn't exactly jibe with what is written on the dealer repair invoice, but according to the invoice the residual issue after the pump, filter, and PEM replacement was a bad fuel pressure sensor that provided a positive pressure reading even when pressu...

DGM, thanks that's very specific and very, very helpful. So role of CEM is ruled out of the Blue wire is successfully supplying battery voltage and the Black wire has a good connection to Ground, and I guess if the voltage differential between the two does not sag when the current/fuel demand increa...

Dealer still unable to figure out the problem. On reflection I'm thinking that this can't be that complicated. If any of you who really know and understand the fuel system and engine controls on this car can look at my logic below, tell me what I'm missing about why this should be so difficult to di...

from what I gather new PEM has not fixed, and dealer has enlisted help of the volvo tech line and FSE (field service engineer I'm guessing?)

wish I had more details as to exactly what they have tested/observed/tried but they are not forthcoming.

maybe fuel pressure sensor? when these fail do they fail high or fail low? possible it thinks there is more pressure than there is and ecu calls for insufficient pressure?

is there any sort of similar interlock built in to the ecu to cut power if sime conditions aren't met (like oil pressure) such that a failed sensor would cause it ro cut the fuel pump? just grasping for anything else to check if the new PEM doesn't cure the problem.

update on this, had car towed to nearest dealer 100km way. They have had it all week, determined it was a fuel delivery problem they just replaced the fuel pump and fuel filter today and it still isn't running. The PEM is to be replaced tomorrow along with a piece of wiring harness corresponding to ...

each time I restart it runs a shorter and shorter period if time, I cleared the codes and the fuel codes are gone but I m now getting EMC 926c and a display message saying engine service is required.

DSC_2771.JPG that relay spot is empty. found a diagram on the back side of the cover that seems to indicate it's underneath, but access appear to involve unscrewing and removing the power lead? after sitting a couple hours the fuel pump now runs when I turn on the ignition and it starts immediately...

that relay spot is empty. found a diagram on the back side of the cover that seems to indicate it's underneath, but access appear to involve unscrewing and removing the power lead? after sitting a couple hours the fuel pump now runs when I turn on the ignition and it starts immediately, runs for 5 t...