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Message: <blockquote data-quote="Rednaxs60" data-source="post: 228384" data-attributes="member: 4617">Quick update.  Fuel system has come under scrutiny - when has it not.  Loosing fuel pressure meaning air in the fuel rail, not good when starting engine.  Non-return valve in main fuel line - no fuel should be leaking back through the FP.  This will be last system check after I replace fuel pressure relief (FPR) valve.Checked the cylinders this morning, all dry, injectors appear to not be leaking. Pressurized system, had fuel shut off valve closed - non-return valve in line, pressure dropped from 36 PSI to 20 PSI in 2 hours 15 minutes.  Pressure bleed has almost stopped but do expect the pressure to be at about 14 PSI in morning.  Appears that this FPR valve - original, has a very weak internal spring but is somewhat effective at the 20 PSI range.  Have a new 3 bar FPR that I will install this week. Getting closer to a resolution.Will start looking at how to install the new coil pack where the OEM coils are.</blockquote>