By oleseahorse
So I have a 92 740 Regina. Not sure what happened first - the fuel pressure dropped to 25 psi causing lack of acceleration, some bogging etc. Pressure should be 43 psi. Also, the fuel pump checkvalve failed and allowed even the 25 psi to bleed back within seconds. As a result, I have to cycle the key (to prime the pump and build pressure in the rail) to start the car without excessively long crank time. So I replaced the pump w an fcp proparts unit. Now 25psi, same miserable running... Read more