fuel pump 190E 2.6 1991
 

OK gang here is the list of findings on my fuel and no start trouble, I pulled a fuel pressure gage from my storage room and the first thing was to put the inlet fuel line to the gage, then key on fuel pumps ran up and stopped. I had a reading of 190 psi and after an hour it bled down to 150. I also found that the rubber hose connections had a slight leak at both metal pipe connection. Next I went to the small line at the fuel pressure regulator but to my surprise the fuel pumps lost power, I check the new OVP and fuses are good. I am at that point of boil so I had to walk away for some thought and more research.

The fuel system pressure was designed to be regulated to about 80-85 psi.

Of course the MAS relay needs an RPM input so that the fuel pumps will run.

fuel pressure
 

OK so if I had removed the cps from its fender connection did I cause loss of signal at the mas and kill the pumps? I do not see that as a truth but I am at a loss as to why I am now apparently getting intermittent signal to the pumps. I think I need to back up and look at this again. what you are saying is that the inlet pressure is to great?

did compression check and I have stating at 1 130, 130, 125, 135, 100, 125, for an average of 124.16. during the cranking of Eng to check compression the fuel pumps started working so I had to unplug the mas each cylinder was defiantly shooting fuel out of the cylinders, had to dry my compression tool out. all reading of comp. was of course on cold engine should expect higher on warm engine.