Youll need scan tool on 2003 taurus to read fuel pressure
Up until 2002 the fuel pressure regulator was vac controlled and mounted in the fuel rail on the intake manifold.
After 2002 I think it is part of the fuel pressure sensor which still mounts on the rail.
You may have to check with the dealer to see which version your engine has.
SOURCE: i have a 2003 f250 an i need to locate the fuel
should be on driverside ont he fule rail with a vaccume line going to it
SOURCE: Very little fuel preasure on Explorer
there are two fuel lines on left side of engine if you trace the lines to the rail one after the regulator is the return line disconnect it and place line in bottle turn on key and measure how much is being drained to bottle should be very little if thers none then its the pump problem .always check power and grounds be for you replace the chek the plug right before the pump on frame rail at left rear leaf spring have seen problems with that plug. if you do replace the pump allways grind clean ground by the pump. hope this helps.
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