I am having a problem with outlets that work intermittently in my 1965 house. Some of the electrical has been redone, however this particular circuit is still on original wiring, i.e. no neutral or ground wires running through the outlet boxes. The circuit feeds 9 outlets, no light switches. 4 of the 9 outlets always work. The other five will work for weeks at a time, then not work, then work again.
Using a receptacle tester, the 4 outlets that always work show correct wiring.
The other outlets show hot/neutral reversed when they are working, and hot/ground reversed when they are not working.
Three of the outlets that don't work are part on an "in-floor" outlet network that was tied back into the other outlets when we did a remodel. That connection is made in one of the outlet boxes that works intermittently.
I've opened all the in-wall outlets and checked the connections, which are solid. I couldn't check one of the in-floor outlets as I had trouble opening it.
Any suggestions would be most welcome, thanks in advance.