car cut out at 60 mph turns over wont start but will run on easy start on 2006 Mazda Mazda5

changed crank camshaft sensor, fuel pressure rail, auto electrician no engine management light no faults recorded

Asked by for the 2006 Mazda Mazda5
check for fuel pressure and spark
its diesel 700pound pressure as its been re-mapped due to removal of dpf there is fuel to injectors changed crank and camshaft sensors and fuel rail