I have to thank all those whom did this job and posting their problems and results on this list. It helped me to easily do this repair.
I have an IO-360 on and RV-7A. I was seeing intermittent low pressure warnings, with the fuel pressures dipping randomly below 20 PSI (normal is 25-30 psi). Ground test resulting in fuel flows of 30 GPH using the AUX pump, so it wasn't a restriction. Running the engine at lower RPM's and leaned appeared to lessen the issue, but didn't completely eliminate it. Also, when fuel pressures dropped, with the engine leaned way back (two PMAGs allows this) RPMs would fall off with low fuel pressure, indicating it wasn't a sensor error, but a real low fuel pressure (and injector flow) issue.
So I ordered a new pump and a shroud and installed them today. Removing the old pump required me to remove the left P-MAG and some other hoses that were restricting access to the pump. The shroud from Spruce did not have to be modified as long as all the fittings were put onto the pump while it was on the bench.
I tried using the grease trick to hold the actuator in the UP position, but, in the Florida heat, it didn't work out. Instead I looped .020 safety wire around the actuator and had a helper put tension on it after pushing the actuator into the UP position. After installing a new gasket with a sealant onto the accessory case, I was able to insert the pump into position and, by hand, get both cap screws started, and turned then further in with a 5/16" ball Allen wrench. Before snugging up the cap screws the .020" safety wire was pulled out. The cap screw safety wiring job was tricky, but given the access with the left P-MAG removed, went smoothly. Then all the fuel lines were again connected.
To test the pump functionality, I removed the lower four spark plugs and turned the engine over with the starter, resulting in 29-32 PSI fuel pressure indications. I then reinstalled and timed the left P-MAG, and connected the other hoses I had disconnected. There were no oil leaks after running the engine...
I did not use a sealant on the cap screws, so will be looking for any oil leaks in that area.
I hope this write up helps others too.....