My friend has a 1986 Mercedes 190e 2.6 and it wont stay running. It will start and run but it wont stay idle. He is asking me what the fuel pressure should be for his particular motor, but I'm thinking he may just need a new fuel pump or a regulator (not sure about the car). Has anyone had that issue or know what the fuel pressure should be for that particular engine? Or had that same issue? I found data on the 2.3, but not a 2.6.
Thanks