A clogged fuel filter could cause low fuel pressure as could a faulty fuel pressure regulator.
You'll have to remove the fuel filter to check it by seeing if you can easily blow through it.
To test the pressure regulator, you'll have to have fuel pressure gauge connected to the fuel system and with the engine running note the fuel pressure; then disconnect the vacuum hose going to the fuel pressure regulator. The fuel pressure should increase it the regulator is working properly.
Sunday, August 17th, 2014 AT 4:36 PM