How do you replace a fuel pressure regulator on a 5.7 vortec engine?

Answer 1

Hi to perform this start by disconnecting your battery. Then releasing pressure from the fuel lines. There should be a valve on one of the lines on top of the manifold. Get a rag to catch the fuel as it comes out.

1) loosen the air box hose clams and remove the air intake

2) loosen all sensors and accelerator cable from intake

3) remove all the 10 mm bolts on the intake manifold and disconnect spark plug wires from distributor cap.

4) their is another 10 mm nut between the fuel lines remove it ( note it helps to loosen this bolt before removing all the other 10mm bolts)as

well as the two 5/8 bolts(brass

fittings) on the fuel lines connected to the intake manifold and set them aside

5)lift the wire harness and lift the whole intake up clearing the center of the spider injection( life and push towards firewall to help clear the radiator outlet hose)

6) set the manifold aside and clean and replace the gaskets

7) remove the clip from the fuel pressure regulator and remove the old unit (note there is a small o-ring

inside remove it may be stuck.

8) lift the harness up to give you clearance and carefully install the intake manifold( be very careful the gasket may want to fall and cause a bad air leak)

9) Torque bolts in sequence and to proper torque specs.

10) connect all sensors and throttle body cables and battery

11) let fuel pump regain fuel pressure by turning the ignition over and off without turning on the vehicle then start the car.