Had the same on my 4/4 sport.The fuel gauge sometimes stick, I was told that was due to the positioning/shape of the fuel tank and because of this the fuel tank float does not work properly untill it reaches a certain point in the fuel tank.
(quote from the dealer"It's a Morgan")
Concerning the oil pressure gauge, it's a known problem and when I was at the factory this was resolved ,i.e in the fuse box something was taken out and replaced by Mark Baldwin( can't tell you exactly what it was ,as I was visiting the factory at that time)
