On the 2.5 V6 they don't use a pressure regulator. They use a pressure sensor attached to the fuel rail under the intake manifold. It sends information to the fuel pump control module (behind the rear drivers side interior panel below the speaker) which then controls fuel pressure by altering the speed of the fuel pumps motor.
Because of the way these systems operate you can't just toss a pressure gauge on them and say "yep low pressure, bad fuel pump". You need to connect a good scan tool to the system then command the pump on and to run at a specific speed and watch the pressure sensor and a pressure gauge.
Friday, March 31st, 2017 AT 12:06 AM