@M80 - you probably don’t have the exact same problem. You’d be better off starting your own thread and description. Include all info about the state of maintenance.
@WesternRoadtripper - there’s no point in doing anything else until an actual fuel pressure gauge is put on it. Having fuel pump out tells you next to nothing. Your friend needs to get the fuel pressure specs and put a gauge on it. M80 could actually follow that same advice.