Loosing fuel pressure. Throwing code for fuel pressure 0089. Have replaced - Fuel pump, fuel filter, fuel pressure sensor (twice), Fuel Control Module and still issue.... will start out at 300 kPa... then down the road will start to drop... won't be able to "go into passing gear... will hit 3k RPM and shudder. then eventually will keep going down in pressure... 200 . then to 100 . then 50's . then to 0... will pull over. stop for a minute. Turn key back on and start and will be back to 300. and then start process all over again. Car has been great to me. bought new and has 289K. but can't keep sinking money into, so any thought would help before I need to scrap it.