John. this renault laguna has a bosch electric fuel pump and the customer has changed it before, it also has a bosch cp1 high pressure pump, with a safety valve that requires 1.5 bar to open before it will start, my low pressure pump develops app 6.0 bar before the filter, and 2.2 bar after the filter, filter has been replaced, filter has 5 pipe connections at top of filter. John