I have an interesting problem with a W12-er 2006 BHT. Sometimes this thing doesn't want to start in the morning. Only the second time he goes on and then goes without problems the whole day (every start without problems and the same). What I suspect is that the forward control of the "pre-fördepump" of the fuel pump on the left (G6 via J49-EKP2) does not work. My Opinion: When ignition 15 is applied, the pump is not intended to produce form for the faster start. Can someone explain to me which critteries the pre-flow control of the pre-shipment pump works? ( According to RL, the currents, voltages, ohms, the flow rates were checked, (pressure regulator exchanged) - everything ok. What is not ok is the holding pressure in the feed line : it drops to 0 bar after 2min (should: 3 bar after 10 min). The check valve in one of the pumps is probably not in the right place. But should not be a reason for the not pre-shipping pressure start of the G6 (or perhaps G23 - SSP 282). Bite for information. Does anyone know such behavior?
