Not saying this is the cause, but A few Years ago, we changed the engine in a PA28-181, the overhauled exchange engine had been supplied by the operator. (purchased direct by the operator) from a well know engine overhaul shop in NSW.
During the overhaul the shop had "neglected" to install the plunger that actuates the engine driven fuel pump. With the wing tanks full, the engine ran fine during ground runs, even though the fuel pressure was reading zero... until it was taxied to a certain place where the attitude of the aircraft on the ramp precluded the flow of fuel to the carby when the engine stopped.
Needless to say the rear case had to come off and the part installed.
Interesting thing the overhaul shop had provided ground test reports that included the fuel pressure at all RPM's